about ifile.it

Is there anyone knowing how to search file-link in ifile.it?
Please tell me!
Thanks!

google > type: "ifile.it/" what_you_are_looking_for

Thanks!
if I want to looking for books about groundwater, Should I type "ifile.it/ groundwater"? Is there a space between / and groundwater?

http://i42.tinypic.com/33mphy9.jpg (not: "ifile.it/ groundwater")

and yes, you have to put a space.