Optimize GOOGLE Search Engine

Here are some commands that may help us searching something in Google.com

Google.com

-intitle = Display pages titled . . .
for example:
-intitle: the-natural
Google will try to find any pages titled THE-NATURAL

inurl = Display url contained . . .
for example:
inurl: html
Google will try to find any pages that the url contains html

site = Display pages from site . . .
for example:
GOOGLE site:the-natural.blogspot.com
Google will try to find any pages from the-natural.blogspot.com and contains GOOGLE

filetype = display only pages contain files with . . . file extension
for example:
filetype:mp3
Google will try to find any pages contain files with mp3 extension