Secret Google Keyword for Search Content

In Internet many content to download, like as ebook, music, videos, software and many more. If you use Google i have 8 secret Google keyword for search content :-

1. For search MP3
intitle:”index.of” mp3 [artis or band name]example : "index.of" mp3
2. For search Ebook
inurl:free ebook filetype:pdf
3. For search Ebook by Title
inurl:free ebook filetype:pdf
4. For search freeware software
inurl:freeware software filetype: exe | rar | zip
5. For Rapidshare Content
+inurl:exe|rar|zip site:rapidshare.com
6. For Search Direktori
"parent directory" /appz/ -xxx -html -htm -php -shtml -opendivx -md5 -md5sums
7. For Search MP3 Directory
"parent directory" MP3 -xxx -html -htm -php -shtml -opendivx -md5 -md5sums