Put quotation marks " " around words that you want to search as a phrase
Example: "building a compost container"
Use the minus sign (-) in front of a word you do not want to appear in your results Example: -football (if you are researching dolphins and do not want info about the team)
Add -com to your search to remove commercial sites from the results
Add site:edu to search college and university sites. You can use this site:command with any domain - .com, .gov - the s in "site" must be lower-case.
A plus + symbol in front of a word or phrase means it will definitely be in your results Example: +"bottlenose dolphin"