diff --git a/README.md b/README.md
index 085ac6c..3fe39df 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,10 @@ GOOS=openbsd make vendor
 
 ## Install
 
+**Requirements:**
+* tesseract
+* pdftotext
+
 See the `scripts/` directory on how to install docstore on Linux or OpenBSD.
 
 ## Config
@@ -53,6 +57,7 @@ See the `scripts/` directory on how to install docstore on Linux or OpenBSD.
 ## Features
 
 * Fulltext indexing of documents
+  * Query Syntax: https://github.com/bcampbell/qs/blob/master/syntax.md
   * The `Index All` button tries add every file not already indexed to the index
 * Custom regex based tags (see https://golang.org/pkg/regexp/syntax/)
   * The `Retag All` button will reapply the current tags to all indexed documents
diff --git a/go.mod b/go.mod
index 6a4c77f..59b541d 100644
--- a/go.mod
+++ b/go.mod
@@ -6,6 +6,7 @@ require (
 	git.giftfish.de/ston1th/godrop/v2 v2.1.0
 	git.giftfish.de/ston1th/jwt/v3 v3.2.0
 	github.com/RoaringBitmap/roaring v0.4.17 // indirect
+	github.com/bcampbell/qs v0.0.0-20161004022730-15caa99abd01
 	github.com/blevesearch/bleve v0.8.0
 	github.com/blevesearch/blevex v0.0.0-20180227211930-4b158bb555a3 // indirect
 	github.com/blevesearch/go-porterstemmer v1.0.2 // indirect
diff --git a/go.sum b/go.sum
index 407066a..a8ee9ef 100644
--- a/go.sum
+++ b/go.sum
@@ -4,6 +4,8 @@ git.giftfish.de/ston1th/jwt/v3 v3.2.0 h1:V6Lh7OjXn4D3HPd/LoDf7w5N7cyiSXEPAQCIfSV
 git.giftfish.de/ston1th/jwt/v3 v3.2.0/go.mod h1:jDALrW7OKeIaqYuMxs3GWyPRnQZmk/R+Lu9p/Em3Ziw=
 github.com/RoaringBitmap/roaring v0.4.17 h1:oCYFIFEMSQZrLHpywH7919esI1VSrQZ0pJXkZPGIJ78=
 github.com/RoaringBitmap/roaring v0.4.17/go.mod h1:D3qVegWTmfCaX4Bl5CrBE9hfrSrrXIr8KVNvRsDi1NI=
+github.com/bcampbell/qs v0.0.0-20161004022730-15caa99abd01 h1:ZkEYngtmNszw0BJt4GoWW5rdn5U6MaFlLAUD4S3KEas=
+github.com/bcampbell/qs v0.0.0-20161004022730-15caa99abd01/go.mod h1:ZgSGz2VRprXTqsfbn6HAH1ePnGiVCrlA3kflJ6Sjxqg=
 github.com/blevesearch/bleve v0.8.0 h1:DCoCrxscCXrlzVWK92k7Vq4d28lTAFuigVmcgIX0VCo=
 github.com/blevesearch/bleve v0.8.0/go.mod h1:Y2lmIkzV6mcNfAnAdOd+ZxHkHchhBfU/xroGIp61wfw=
 github.com/blevesearch/blevex v0.0.0-20180227211930-4b158bb555a3 h1:U6vnxZrTfItfiUiYx0lf/LgHjRSfaKK5QHSom3lEbnA=
diff --git a/pkg/cmd/cmd.go b/pkg/cmd/cmd.go
index 10801de..3d0fe41 100644
--- a/pkg/cmd/cmd.go
+++ b/pkg/cmd/cmd.go
@@ -125,6 +125,30 @@ func loadConfig() error {
 	if err != nil {
 		return err
 	}
+	if config.RunDir == "" {
+		config.RunDir = defRunDir
+	}
+	if config.User == "" {
+		config.User = defRunUser
+	}
+	if config.Group == "" {
+		config.Group = defRunGroup
+	}
+	if config.ListenAddr == "" {
+		config.ListenAddr = defListen
+	}
+	if config.LogFile == "" {
+		config.LogFile = defLogFile
+	}
+	if config.CMDTimeout == 0 {
+		config.CMDTimeout = defTimeout
+	}
+	if config.TesseractThreads == 0 {
+		config.TesseractThreads = tesseractThreads
+	}
+	if config.TesseractOEM == 0 {
+		config.TesseractOEM = tesseractOEM
+	}
 	return file.Close()
 }
 
diff --git a/pkg/core/types.go b/pkg/core/types.go
index 169c9a5..78e006f 100644
--- a/pkg/core/types.go
+++ b/pkg/core/types.go
@@ -17,7 +17,7 @@ type User struct {
 type Result struct {
 	ID   string
 	Path string
-	Tags string
+	Tags []string
 	HTML template.HTML
 }
 
diff --git a/pkg/index/index.go b/pkg/index/index.go
index 6047a3a..cedc7ba 100644
--- a/pkg/index/index.go
+++ b/pkg/index/index.go
@@ -5,6 +5,7 @@ package index
 import (
 	"errors"
 	"git.giftfish.de/ston1th/docstore/pkg/core"
+	"github.com/bcampbell/qs"
 	"github.com/blevesearch/bleve"
 	"github.com/blevesearch/bleve/document"
 	"github.com/blevesearch/bleve/mapping"
@@ -107,7 +108,11 @@ func (i *Index) Delete(id string) error {
 }
 
 func (i *Index) Search(search string) (results core.Results, err error) {
-	req := bleve.NewSearchRequest(bleve.NewQueryStringQuery(search))
+	q, err := qs.Parse(search)
+	if err != nil {
+		return
+	}
+	req := bleve.NewSearchRequest(q)
 	req.Highlight = bleve.NewHighlightWithStyle("html")
 	req.Size = maxSearchResult
 	res, err := i.i.Search(req)
@@ -129,7 +134,7 @@ func (i *Index) Search(search string) (results core.Results, err error) {
 				for _, f := range frags {
 					t += f
 				}
-				r.Tags = strings.ReplaceAll(strings.ReplaceAll(t, "<mark>", ""), "</mark>", "")
+				r.Tags = append(r.Tags, strings.ReplaceAll(strings.ReplaceAll(t, "<mark>", ""), "</mark>", ""))
 			}
 			if fragField == textField || fragField == createdField {
 				for _, f := range frags {
diff --git a/pkg/server/templates.go b/pkg/server/templates.go
index bafc871..1774ec4 100644
--- a/pkg/server/templates.go
+++ b/pkg/server/templates.go
@@ -297,6 +297,13 @@ const (
         <h2>{{.BodyTitle}}</h2>
     </div>
 </div>
+<div class="row mt-3">
+    <div class="col col-nopad">
+        <div class="alert alert-primary">
+            <p>This log will display error information about batch operations such as <code>Retag All</code> or <code>Index All</code>.</p>
+        </div>
+    </div>
+</div>
 <div class="row mt-3">
     <textarea class="form-control input-sm md-text mono" rows="30" spellcheck="false" autofocus>{{.Data}}</textarea>
 </div>
@@ -451,20 +458,22 @@ const (
     <thead>
         <tr>
             <th>File</th>
-            <th>Tag</th>
+            <th>Tags</th>
         </tr>
     </thead>
     <tbody>
     {{range $item := .Data}}
     <tr>
         <td>
-        <a class="mono" href="{{$item.Path}}"><b>{{$item.Path}}</b></a>
-        {{if $item.HTML}}
-        <br><pre class="wrap">{{$item.HTML}}</pre>
-        {{end}}
+            <a class="mono" href="{{$item.Path}}"><b>{{$item.Path}}</b></a>
+            {{if $item.HTML}}
+            <br><pre class="wrap">{{$item.HTML}}</pre>
+            {{end}}
         </td>
         <td>
-            {{if $item.Tags}}<a href="/search?query=tags:{{$item.Tags}}" class="btn badge btn-primary">{{$item.Tags}}</a>{{end}}
+            {{range $t := $item.Tags}}
+            <a href="/search?query=tags:{{$t}}" class="btn badge btn-primary">{{$t}}</a>
+            {{end}}
         </td>
     </tr>
     {{end}}
@@ -477,9 +486,14 @@ const (
     <div class="col col-nopad">
         <div class="alert alert-primary">
             <h4>Query Syntax</h4>
+            <p>Documentation: <a target="_blank" rel="noopener noreferrer" href="https://github.com/bcampbell/qs/blob/master/syntax.md">https://github.com/bcampbell/qs/blob/master/syntax.md</a></p>
             <p>Fields</p>
             <pre><code>tags:insurance
-tags:insurance or tags:invoice
+tags:insurance OR tags:invoice
+# combine tags
+tags:insurance AND tags:invoice
+# exclude tags
+tags:insurance -tags:invoice
 created:&lt;="2016-09-21"</code></pre>
             <p>Fulltext</p>
             <pre><code>some text here</code></pre>
diff --git a/scripts/install_linux.sh b/scripts/install_linux.sh
index ed90c5d..72a75af 100755
--- a/scripts/install_linux.sh
+++ b/scripts/install_linux.sh
@@ -1,4 +1,5 @@
 #!/bin/sh
+apt install -y poppler-utils tesseract-ocr tesseract-ocr-deu tesseract-ocr-eng
 groupadd docstore
 useradd -g docstore docstore
 mkdir /var/lib/docstore
diff --git a/templates/logs.html b/templates/logs.html
index d2f00de..b7b1b53 100644
--- a/templates/logs.html
+++ b/templates/logs.html
@@ -4,6 +4,13 @@
         <h2>{{.BodyTitle}}</h2>
     </div>
 </div>
+<div class="row mt-3">
+    <div class="col col-nopad">
+        <div class="alert alert-primary">
+            <p>This log will display error information about batch operations such as <code>Retag All</code> or <code>Index All</code>.</p>
+        </div>
+    </div>
+</div>
 <div class="row mt-3">
     <textarea class="form-control input-sm md-text mono" rows="30" spellcheck="false" autofocus>{{.Data}}</textarea>
 </div>
diff --git a/templates/search.html b/templates/search.html
index 1158011..82f5046 100644
--- a/templates/search.html
+++ b/templates/search.html
@@ -25,20 +25,22 @@
     <thead>
         <tr>
             <th>File</th>
-            <th>Tag</th>
+            <th>Tags</th>
         </tr>
     </thead>
     <tbody>
     {{range $item := .Data}}
     <tr>
         <td>
-        <a class="mono" href="{{$item.Path}}"><b>{{$item.Path}}</b></a>
-        {{if $item.HTML}}
-        <br><pre class="wrap">{{$item.HTML}}</pre>
-        {{end}}
+            <a class="mono" href="{{$item.Path}}"><b>{{$item.Path}}</b></a>
+            {{if $item.HTML}}
+            <br><pre class="wrap">{{$item.HTML}}</pre>
+            {{end}}
         </td>
         <td>
-            {{if $item.Tags}}<a href="/search?query=tags:{{$item.Tags}}" class="btn badge btn-primary">{{$item.Tags}}</a>{{end}}
+            {{range $t := $item.Tags}}
+            <a href="/search?query=tags:{{$t}}" class="btn badge btn-primary">{{$t}}</a>
+            {{end}}
         </td>
     </tr>
     {{end}}
@@ -51,9 +53,14 @@
     <div class="col col-nopad">
         <div class="alert alert-primary">
             <h4>Query Syntax</h4>
+            <p>Documentation: <a target="_blank" rel="noopener noreferrer" href="https://github.com/bcampbell/qs/blob/master/syntax.md">https://github.com/bcampbell/qs/blob/master/syntax.md</a></p>
             <p>Fields</p>
             <pre><code>tags:insurance
-tags:insurance or tags:invoice
+tags:insurance OR tags:invoice
+# combine tags
+tags:insurance AND tags:invoice
+# exclude tags
+tags:insurance -tags:invoice
 created:&lt;="2016-09-21"</code></pre>
             <p>Fulltext</p>
             <pre><code>some text here</code></pre>