Google Search is a powerful tool. From googleguide.com, I downloaded to the desktop of each of my computers a PDF file version of the Google Search cheat-sheet seen below (which is two jpg files). This is a tool I use every day. The Google Search cheat-sheet can help you improve the targeting of your searches. I hope you find it as useful as I have.
Nancy Blachman created googleguide.com as an interactive tutorial for Google’s capabilities, features, and services. Though the site appears to not been updated since 2012, there is still plenty of data current enough to turn you into a Google Guru.