If you want to use Google to search within a site, you need to add e.g.
site:www.funtrivia.com to your query. Sometimes it's useful to leave out the www part, like when you want to find something on about.com, because their pages have the format of books.about.com and films.about.com etc. and those won't be searched if you'd use the site:www.about.com format.
If you're unsure about all the options Google offers, you might want to try
Soople, which is basically Google for dummies.
