diff --git a/app/src/main/java/com/hippo/ehviewer/widget/SearchLayout.java b/app/src/main/java/com/hippo/ehviewer/widget/SearchLayout.java
index 927f1efe8..d2c916f6d 100644
--- a/app/src/main/java/com/hippo/ehviewer/widget/SearchLayout.java
+++ b/app/src/main/java/com/hippo/ehviewer/widget/SearchLayout.java
@@ -280,7 +280,9 @@ public class SearchLayout extends EasyRecyclerView implements CompoundButton.OnC
     @Override
     public void onClick(View v) {
         if (mNormalSearchModeHelp == v) {
-            new AlertDialog.Builder(getContext()).setTitle("TODO").setMessage("TODO").show();
+            new AlertDialog.Builder(getContext())
+                    .setMessage(R.string.search_tip)
+                    .show();
         }
     }
 
diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 0d01fbda5..8c53793ea 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -113,6 +113,8 @@
     <string name="search_specify_gallery">指定画廊</string>
     <string name="search_enable_advance">启用高级选项</string>
 
+    <string name="search_tip">一般搜索：就是搜索。\n\n指定上传者：列出该上传者上传的画廊。其他选项会被忽略。\n\n指定标签：列出含有该标签的画廊。其他选项会被忽略。\n\n指定画廊：跳转至该画廊。关键字应为“gid token”。</string>
+
     <string name="search_sname">搜索画廊</string>
     <string name="search_stags">搜索画廊标签</string>
     <string name="search_sdesc">搜索画廊描述</string>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index ae9b2c795..273a37d41 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -113,6 +113,8 @@
     <string name="search_specify_gallery">指定畫廊</string>
     <string name="search_enable_advance">啟用高級選項</string>
 
+    <string name="search_tip">一般搜索：就是搜索。\n\n指定上傳者：列出該上傳者上傳的畫廊。其他選項會被忽略。\n\n指定標籤：列出含有該標籤的畫廊。其他選項會被忽略。\n\n指定畫廊：跳轉至該畫廊。關鍵字應為“gid token”。</string>
+
     <string name="search_sname">搜索畫廊</string>
     <string name="search_stags">搜索畫廊標籤</string>
     <string name="search_sdesc">搜索畫廊描述</string>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 92ce36173..2a0e0f1a6 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -113,6 +113,8 @@
     <string name="search_specify_gallery">指定畫廊</string>
     <string name="search_enable_advance">啟用高階選項</string>
 
+    <string name="search_tip">一般搜尋：就是搜尋。\n\n指定上傳者：列出該上傳者上傳的畫廊。其他選項會被忽略。\n\n指定標籤：列出含有該標籤的畫廊。其他選項會被忽略。\n\n指定畫廊：跳轉至該畫廊。關鍵字應為“gid token”。</string>
+
     <string name="search_sname">搜尋畫廊</string>
     <string name="search_stags">搜尋畫廊標籤</string>
     <string name="search_sdesc">搜尋畫廊描述</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8943d9c0b..04450eb37 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -155,6 +155,8 @@
     <string name="search_specify_gallery">Specify gallery</string>
     <string name="search_enable_advance">Enable advance options</string>
 
+    <string name="search_tip">Normal search: Just search.\n\nSpecify uploader: List galleries which uploaded by the uploader. Other options will be ignored.\n\nSpecify tag: List galleries which contains the tag. Only one tag accepted. Other options will be ignored.\n\nSpecify gallery: Go to the gallery. The keyword should be \"gid token\".</string>
+
     <string name="search_sname">Search Gallery</string>
     <string name="search_stags">Search Gallery Tags</string>
     <string name="search_sdesc">Search Gallery Description</string>