Major Problem what we face whenever we are making a Google Search is
We have to search for a particular file and a particular topic and we are not able to get it

Here comes a Trick
ext:doc curriculam vitae
this would be giving all the document files related to Curriculam Vitae....
Similarly if u need to search a phone number of a particular Organization then use this Tag
Phonebook: Infosys
jus keep waiting we have more.....