Google search comes in multiple flavours.
There is trhe simple Google search. And then there are various specialised seach tools and services that can really enhance your Google search experience.
If you find any difficulty in remembering the multitude of Google services/search operators, then the service Gseek (gSeek, search google easier with a simplifed interface), created for helping you access various Google tools from a single interface, may come in handy.
It has separate search boxes for normal search, adsense search, movie search, music search, video search, text/book search, filetype based search, language and country based search and so on.