QUOTE(NightFelix @ Nov 18 2013, 04:36 PM)
Alright I test it tonight when I reach home.
I just found that the Cynogenmod File Manager able to access the /data/data file and all file inside are visible too.
by the way, what is chmod those what?

Google found answer but not quite understand.

with root access, any file manager (or ADB) can access /data/data
chmod - a command to change the access control of files / folder.
basically, /data/data contains all your stored preferences, saved game, data from various APP in your phone. for example, say you have an App i.e. GoogleHome.apk. When you install the App, the APK will be copy to /data/app/com.google.android.launcher-0.9.6.886092.apk
Each App in Android will be assigned an UID. To find out about that UID, just do "ls -l /data/app/"
Once you get it's UID, to restored it's preferences, saved files, etc. Copy the /data/data/com.google.android.launcher-0.9.6.886092 back to the phone. Then, you need to change the owner and permission of that folder and everything insider.
"chmod -R" allow you change the permission of that folder to the UID of that App and all it's folders inside. You may also need to use "chown" to change the owner. These are standard Unix command.
Alternatively, file browser such as Root Explorer allow you to change permission and owner via GUI without these commands.