You can search files on Rapidshare server fast and easy using this methods :

Go to Google.com and fill in the google search “site:rapidshare.de” and add this:
“inurl:pdf” for Ebooks in PDF Format
“inurl:aviwmvmpgnva” for Movies
“inurl:mp3oggwma” for Audio Files
“inurl:exe” for executable application
“inurl:ziprar7ziptar” for RAR, ZIP, 7ZIP or TAR compressed archieve

For Examples:
If your search for english learning books in pdf format, then you must type :

“site:rapidshare.de “inurl:pdf” english learning books”

(obviously without the quotes)
Similarly if your searching for rar books, then it should be something like “site:rapidshare.de inurl:ziprar7ziptar book”