Using alternative search engines to Google, may find you results that the google search did not retrieve, and may feature different ways of sorting and filtering your results.
Dogpile is a meta search engine; it runs searches over a number of different search engines (including Google) and gives you all the results at once.
Yahoo is a search engine and also provides its traditional directory of sites, compiled by humans.
AllTheWeb is another popular rival to Google which will give good, relevant results.
Bing is Microsoft's Search Engine, featuring good travel information, a convenient preview pane and a sophisticated visual/image search,
Truveo searches video content on the web by categories, channels and search terms.
Blinkx allows you to select a wide variety of categories, plus keyword searches.
Youtube searches the vast Youtube site for videos, with a range of complex filters. Youtube only searches the videos on the Youtube website, it does not search the web
When you run your search, you can select the filters at the top left. This will give you a range of options to filter your results, including: