Google Power Searching
Clicking on the "Tools" button from your search results will activate 2 new options that allow you to set a time range to search (e.g. the past 24 hours, or 2012-2016) or enable "verbatim" results, which turns off Google's customizations based on your location, search history, etc.
Advanced Search Commands
Enclose words in quotation marks to find them only when they appear together in that order. For example, searching "my cat" will find I love my cat but not I love my dog and cat.
You can also use quotes around a single word to turn off Google's automatic synonym search or to require it in your results if Google is eliminating it (look for the "Missing:" message under your results).
|* (asterisk)||The wildcard operator stands in for an undefined word. For example, searching "worst * ever" will find worst episode ever and worst movie ever.|
|- (minus sign)||Adding this to the front of a word will exclude results with that word. For example, searching goalie -hockey will find pages about goalies but not ones that mention hockey.|
|intitle: and allintitle:||Match search terms in the title of the web page instead of anywhere. Use intitle: for single terms and allintitle: for multiple terms.|
|site:||Allows you to search Google's index for a particular website. For example, searching site:wooster.edu library will find pages about the library on Wooster's website. You can combine this with the wildcard to search on a top-level domain. For example, searching site:*.gov will limit your results to government websites and site:*.edu will limit your results to academic sites.|
|source:||Works with Google News. Add the name of a news source to see results from only that source. For example, wooster source:new york times will return news results matching wooster exclusively from the New York Times.|
|related:||Combine with a web address to see what sites Google thinks are related to it. For example, related:wooster.edu identifies things like Ohio University and the University of Akron as related sites. Potentially useful when scouting for organizations related to your research area.|
|AROUND(n)||Use term1 AROUND(n) term2 to find pages where the two terms appear within n words of one another. For example, searching cat AROUND(3) dog will find pages where the words "cat" and "dog" appear with up to 3 words in between them.
|filetype:||Limit your results to documents that match a certain file extension. The most common uses for this operator might be filetype:pdf for PDF files and filetype:docx or filetype:doc for Word documents.|