Google in Genealogy

Learn to Use Google in Genealogy Searches - Google Genealogy Tips: "First, remember you won't find data from every website using Google, Yahoo, or any internet search engine. Google can't search inside databases such as the Castle Garden, SSDI, LDS Family Search. For those searches you will have to go directly to each website since you cannot search a database using Google."

the above is a highly commercial site but do study the concept of "deep web" - by Google Search - first
and learn about googles own tips:-

Advanced Search
Preferences
Language Tools

Advanced Search Tips | About Google

Google Pack: " Google Toolbar for Internet ExplorerSearch from any web page and autofill forms
and block annoying pop-ups" also Google Toolbar for Firefox

I don't use Safari because there is no gogle tool bar yet