Google is your friend, but sometimes it is an excessively generous friend, returning loads of hits, most of them irrelevant to your search. Fortunately, there are a couple of tricks that can help trim down the dreck dramatically.
The first and most important trick is quotation marks. Lets say I wanted to find web pages on Henry Ford. If I simply search on Henry Ford, I will get back all pages with both the word Henry and Ford in them, including pages by any guy named Henry who is selling his Ford. But if I put quotes around my terms like so "Henry Ford", I will only get those pages which refer specifically to Henry Ford
The other trick which can be handy is using the straight up and down character | to mean 'or'. Suppose I want pages on the city of Vancouver in the Canadian province of British Columbia. Most Canadians don't bother with the full name and just use the abbreviation, BC. But we can craft a search using both as so: Vancouver BC|"British Columbia" (note we've also used our quote trick to restrict the term British Columbia).
By mentioning the province, we eliminate any references to the Vancouver in Washington state in the US, but we could have also have done the same by instructing google to eliminate pages referring to it as follows: Vancouver -WA -Washington, though at the risk of having pages about people with the last name Vancouver being included. In truth, that's probably not much of a problem. It's best to start with a simple search, then apply these tricks as needed.
Just these three tricks, quotes, |, and the minus sign to eliminate terms, especially when used in combination, can go a very long way in helping you to narrow your searches.