Here re five more need to know search operators for searching the web.
Cache Search
If you are looking for a recently deleted article or are wanting on older version of a website’s home page, using the word “cache:” then the URL will generate the Google’s cached version of the web page.
Note: Do not put a space between cache: and the URL (web address).
Define
If you are looking for a definition of a word or phrase, using the word “define:” before your query will generate definitions from pages on the web for the term specified.
Source Search
Including the word “source:” in your query, will restrict your search to articles from the news source with the ID you specify.
For example, the search, “Election source:New York Times”, will return articles with the word “election” that appear in the New York Times.
Plus (+) Operator
Google ignores common words and characters such as where, the, how, and other digits and letters that slow down your search without improving the results. If a common word is essential to getting the results you want, you can make sure we pay attention to it by putting a "+" sign in front of it.
Search Example: peanut butter +and jelly
Terms you want to exclude (-)
By attaching a minus sign and space immediately before a word tells Google that you do not want pages that contain that particular word to appear in the search results. For example, in the query [ anti-virus software ], the minus sign is used as a hyphen and will not be interpreted as an exclusion symbol; whereas the query [ anti-virus -software ] will search for the words 'anti-virus' but exclude references to software.
Additionally you can narrow down your search results by excluding as many words as you would like. The – sign can also be used to exclude more than just words. For example, place a hyphen before the 'site:' operator (without a space) to exclude a specific site from your search results.
"OR" search
To find pages that include either of two search terms, add an uppercase OR between the terms.
Search Example: london OR paris vacations
Sources:
?Google Guide: Making Searching Easier
