[gnome] Where did my documents go?

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http://ubuntuforums.org – I have installed gnome-shell alongside Unity last night. Now, when I press the super key and type in the key word to pull up some file, I get nothing in the search result. Gnome shell is just pulling up applications. No 'Documents' section, no 'Recent files', etc... I thought it might be an indexing problem, so I manually opened and closed the file through nautilus a couple times. When I tried to do 'Windows/meta key', 'file name', still nothing. I only have 300 MB of personal files on this computer, so I don't think it's an indexing issue. I had a similar problem on another Gnome distrib (Hardware)