Google search operators
The following table lists the search operators that work with each Google search service. Click on an operator to jump to its description — or, to read about all of the operators, simply scroll down and read all of this page. The following is an alphabetical list of the search operators. This list includes operators that are not officially supported by Google and not listed in Google’s online help.
Advanced search operators are query words or symbols that perform special actions in Gmail search. These operators allow you to find what you're looking for quickly and accurately. They can also be used to set up filters so you can organize your inbox automatically. Some of the most useful operators are listed below. You can also refine your search by clicking the arrow in the search box. Boolean operators
But with the resource being enormous comes one issue: it is almost impossible to search it efficiently. And there are no official guides on how to search YouTube to actually find something. However, not many people know how flexible YouTube’s search function actually is. About 2 years ago (maybe more) Google started operating YouTube search — if you haven’t noticed Google Video Search and YouTube search have even identical (advanced) search options. And with Google coming into play, there turns out to be some really tricky and smart ways to search YouTube using Google search operators. The Issue How to Search YouTube Like a PRO with Google Advanced Operators