Web Search Engines Search Engine Guide is an incredible resource for identifying which search engines use which strategies. Indexes every word in millions of Web pages and 14,000 Usenet newsgroups.
Quotation marks are critical if searching a phrase, e.g.
Cyber411 - Searches 16 search engines and subject directories simultaneously. Dogpile - Searches 11 different Search Engines, Usenet, FTP addresses and search engine news wires. Compiles results into one list. Links to most-used sites such as Amazon, CBS Sportsline, WinZip, etc. Conceptual searching of the Web, finds not only your keyword, but concepts related to it.