Heres a neat trick.
Instead of using the site search function, go into google and do the following,
1. Type whatever you want to find. For example, bananas.
2. Then after that type :site: and the address of whatever site you want to search "bananas" on.
This is how it should look like. "
bananas :site:fakku.net"
And magic! It searches the whole site for anything banana related.
In action:
It works for any site on the internet!
You don't know how helpful this trick has been for me, trying to find elusive hentai and music.