these work with Google's search engine, may work with others but not tested
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"query"- Double quotes are used to search for a specific phrase. If you were to search for, let's say,halloween in Nebraska, not all the results will have that exact phrase. Instead, Google will treat those words as separate and show the results accordingly. However, if you do"halloween in Nebraska", only those results will show up that have the exact phrase. -
query -phrase- Use this to exclude something from the results. For example, if I were to search forMicrosoft -Google, that means I need results that talk about Microsoft without any reference to Google. -
intitle:query- This can be used when you need to locate text in the title of an article. So doing a search forintitle:Windows 8 Start Screenwill show the articles that have this phrase in their title. -
site:query- You may use this one when you want to restrict your search to a specific site. If you dosite:guidingtech.com, it will only show posts from our blog. If you were to dogmail site:guidingtech.com, it will show the posts about Gmail on Guiding Tech. -
filetype:- This is for locating files. For instance,filetype:pdfwill return results that contain PDF files.
Tip: All the above operators can also be used in conjunction with each other. For example, you could do "Gmail" -Firefox to find posts about Gmail that exclude references to Firefox. Try different mashups! Be creative!
src: Guiding Tech