Use following keywords in google to see all rapidshare folders available on internet

site:rapidshare.com inurl:users "*"
site:rapidshare.de inurl:users "*"
site:rapidshare.com inurl:files "*"
site:rapidshare.de inurl:files "*"
site:rapidshare.com inurl:users (passpassword)
site:rapidshare.de inurl:users (passpassword)

Suppose u need some info on hacking.Then u can try following keywords to see all rapidshare folders having any hacking related thing in it

site:rapidshare.com inurl:users "hack"
site:rapidshare.com inurl:users "hacking"