diff --git a/Blogger/api/ai/analyse.lua b/Blogger/api/ai/analyse.lua
index d748e84..5785ac3 100644
--- a/Blogger/api/ai/analyse.lua
+++ b/Blogger/api/ai/analyse.lua
@@ -42,6 +42,23 @@ if data then
     end
 
     cluster.tfidf(documents)
+    -- indexing all terms to cache file
+    local cache_file =  dbpath..".index.json"
+    local f = io.open(cache_file, "w")
+    if f then
+        local indexes = {}
+        for id, doc in pairs(documents) do
+            for term,v in pairs(doc) do
+                if not indexes[term] then
+                    indexes[term] = {}
+                end
+                indexes[term][tostring(id)] = doc[term].tfidf
+            end
+        end
+        f:write(JSON.encode(indexes))
+        f:close()
+    end
+    --
     --local v = cluster.search("arm", documents)
     --echo(JSON.encode(v))
     local vectors, maxv, size = cluster.get_vectors(documents)
diff --git a/Blogger/build/debug/api/ai/analyse.lua b/Blogger/build/debug/api/ai/analyse.lua
index d748e84..5785ac3 100644
--- a/Blogger/build/debug/api/ai/analyse.lua
+++ b/Blogger/build/debug/api/ai/analyse.lua
@@ -42,6 +42,23 @@ if data then
     end
 
     cluster.tfidf(documents)
+    -- indexing all terms to cache file
+    local cache_file =  dbpath..".index.json"
+    local f = io.open(cache_file, "w")
+    if f then
+        local indexes = {}
+        for id, doc in pairs(documents) do
+            for term,v in pairs(doc) do
+                if not indexes[term] then
+                    indexes[term] = {}
+                end
+                indexes[term][tostring(id)] = doc[term].tfidf
+            end
+        end
+        f:write(JSON.encode(indexes))
+        f:close()
+    end
+    --
     --local v = cluster.search("arm", documents)
     --echo(JSON.encode(v))
     local vectors, maxv, size = cluster.get_vectors(documents)
diff --git a/Blogger/build/release/Blogger.zip b/Blogger/build/release/Blogger.zip
index 8f81d6c..b6e8387 100644
Binary files a/Blogger/build/release/Blogger.zip and b/Blogger/build/release/Blogger.zip differ
diff --git a/packages.json b/packages.json
index 8ee1722..f5c1287 100644
--- a/packages.json
+++ b/packages.json
@@ -95,7 +95,7 @@
 		"description": "https://raw.githubusercontent.com/lxsang/antosdk-apps/2.0.x/Blogger/README.md",
 		"category": "Internet",
 		"author": "Xuan Sang LE",
-		"version": "0.2.10-a",
+		"version": "0.2.11-a",
 		"dependencies": ["SimpleMDE@2.18.0-r","Katex@0.11.1-r","SQLiteDB@0.1.0-a"],"mimes":["none"],
 		"download": "https://raw.githubusercontent.com/lxsang/antosdk-apps/2.0.x/Blogger/build/release/Blogger.zip"
 	},