This small selection of search engines should be helpful when Google — or even Google Advanced Search — results disappoint, or whenever you want to broaden your research by looking at other sources. This guide also includes links to some "non-tracking" search engines.
(But don't give up on Google until you've tried the Advanced Search options)
Here are a few good general search engines.
For way, way more, see Phil Bradley's list of over 180 web search engines!