link: Google search commands
You probably knew that including quotation marks around a group of words in a Google search tells Google to look for the entire phrase. Or that putting a negative sign in front of a word means you want to find documents that don’t have that term.
You might also have known that using “site:” before a domain will restrict the search to pages in that domain. Or that “related:” before a url will show results related to that page. And you might know that putting “define:” before a word will give you the definition of that word.
But I’m willing to bet there are plenty of tips in this reference that you had no idea about! This page gives you goodies like “filetype:” and “inurl:” and “bphonebook:” and tons more search commands that you will surely find useful.