Two handy, attractive guides to some of the most useful search operators and modifiers for getting the most out of your Google searches. Many (not all) of these will work in other search engines, such as Bing or Yahoo.
We focus primarily on Google in this course, but you're free to pick your poison.
Yeah, you'll probably want to print this one out and keep it next to your computer.
Alex Chitu, Google Operating System Blog, March 8, 2013
The site: operator is, without question, the advanced search operator I use the most in my own searches. This blog post explains some really powerful ways to use the site: operator to search within domains.