diff --git a/browser/finder/index.js b/browser/finder/index.js
index 7fef8c7d..36521d1c 100644
--- a/browser/finder/index.js
+++ b/browser/finder/index.js
@@ -119,9 +119,9 @@ FinderMain.propTypes = {
 function remap (state) {
   let { articles, folders, status } = state
 
-  let filters = status.search.split(' ').map(key => key.trim()).filter(key => key.length > 0 && !key.match(/^#$/)).map(key => {
-    if (key.match(/^in:.+$/)) {
-      return {type: FOLDER_FILTER, value: key.match(/^in:(.+)$/)[1]}
+  let filters = status.search.split(' ').map(key => key.trim()).filter(key => key.length > 0 && !key.match(/^\/$/) && !key.match(/^#$/)).map(key => {
+    if (key.match(/^\/.+$/)) {
+      return {type: FOLDER_FILTER, value: key.match(/^\/(.+)$/)[1]}
     }
     if (key.match(/^#(.+)/)) {
       return {type: TAG_FILTER, value: key.match(/^#(.+)$/)[1]}
@@ -134,7 +134,7 @@ function remap (state) {
 
   if (folders != null) {
     let targetFolders = folders.filter(folder => {
-      return _.findWhere(folderFilters, {value: folder.name})
+      return _.find(folderFilters, filter => folder.name.match(new RegExp(`^${filter.value}`)))
     })
     status.targetFolders = targetFolders
 
@@ -164,6 +164,7 @@ function remap (state) {
   let activeArticle = _.findWhere(articles, {key: status.articleKey})
   if (activeArticle == null) activeArticle = articles[0]
 
+  console.log(status.search)
   return {
     articles,
     activeArticle,
diff --git a/browser/finder/reducer.js b/browser/finder/reducer.js
index 72b087c3..76ddde7f 100644
--- a/browser/finder/reducer.js
+++ b/browser/finder/reducer.js
@@ -14,10 +14,10 @@ function status (state = initialStatus, action) {
   switch (action.type) {
     case SELECT_ARTICLE:
       state.articleKey = action.data.key
-      return state
+      return Object.assign({}, state)
     case SEARCH_ARTICLE:
       state.search = action.data.input
-      return state
+      return Object.assign({}, state)
     default:
       return state
   }
diff --git a/browser/main/HomePage.js b/browser/main/HomePage.js
index 57094068..e3fe68be 100644
--- a/browser/main/HomePage.js
+++ b/browser/main/HomePage.js
@@ -143,9 +143,9 @@ function remap (state) {
   })
 
   // Filter articles
-  let filters = status.search.split(' ').map(key => key.trim()).filter(key => key.length > 0 && !key.match(/^#$/)).map(key => {
-    if (key.match(/^in:.+$/)) {
-      return {type: FOLDER_FILTER, value: key.match(/^in:(.+)$/)[1]}
+  let filters = status.search.split(' ').map(key => key.trim()).filter(key => key.length > 0 && !key.match(/^\/$/) && !key.match(/^#$/)).map(key => {
+    if (key.match(/^\/.+/)) {
+      return {type: FOLDER_FILTER, value: key.match(/^\/(.+)$/)[1]}
     }
     if (key.match(/^#(.+)/)) {
       return {type: TAG_FILTER, value: key.match(/^#(.+)$/)[1]}
@@ -158,7 +158,7 @@ function remap (state) {
 
   if (folders != null) {
     let targetFolders = folders.filter(folder => {
-      return _.findWhere(folderFilters, {value: folder.name})
+      return _.find(folderFilters, filter => folder.name.match(new RegExp(`^${filter.value}`)))
     })
     status.targetFolders = targetFolders
 
@@ -204,7 +204,7 @@ function remap (state) {
     let newArticle = _.findWhere(articles, {status: 'NEW'})
     let FolderKey = folders[0].key
     if (folderFilters.length > 0) {
-      let targetFolder = _.findWhere(folders, {name: folderFilters[0].value})
+      let targetFolder = _.find(folders, folder => folder.name.match(new RegExp(`^${folderFilters[0].value}`)))
       if (targetFolder != null) FolderKey = targetFolder.key
     }
 
diff --git a/browser/main/HomePage/ArticleTopBar.js b/browser/main/HomePage/ArticleTopBar.js
index bfa38cae..285b95de 100644
--- a/browser/main/HomePage/ArticleTopBar.js
+++ b/browser/main/HomePage/ArticleTopBar.js
@@ -10,7 +10,7 @@ const searchTutorialElement = (
     <text x='450' y='33' fill={BRAND_COLOR} fontSize='24'>Search some posts!!</text>
     <text x='450' y='60' fill={BRAND_COLOR} fontSize='18'>{'- Search by tag : #{string}'}</text>
     <text x='450' y='85' fill={BRAND_COLOR} fontSize='18'>
-    {'- Search by folder : in:{folder_name}\n'}</text>
+    {'- Search by folder : /{folder_name}\n'}</text>
 
     <svg width='500' height='300'>
       <path fill='white' d='M54.5,51.5c-12.4,3.3-27.3-1.4-38.4-7C11.2,42,5,38.1,5.6,31.8c0.7-6.9,8.1-11.2,13.8-13.7
@@ -117,7 +117,7 @@ export default class ArticleTopBar extends React.Component {
             }
             <div className={'tooltip' + (this.state.isTooltipHidden ? ' hide' : '')}>
               - Search by tag : #{'{string}'}<br/>
-              - Search by folder : in:{'{folder_name}'}
+              - Search by folder : /{'{folder_name}'}
             </div>
           </div>
 
diff --git a/lib/reducer.js b/lib/reducer.js
index 52cd5916..0d28efb1 100644
--- a/lib/reducer.js
+++ b/lib/reducer.js
@@ -131,7 +131,7 @@ function status (state = initialStatus, action) {
       return state
     case SWITCH_FOLDER:
       state.mode = IDLE_MODE
-      state.search = `in:${action.data} `
+      state.search = `/${action.data} `
 
       return state
     case SWITCH_MODE: