Google搜索特殊字符的方法

Punctuation and symbols in search

Generally, most punctuation and special characters are ignored in Google Search. However, you can use some characters that modify search terms to help you find exactly what you’re looking for.

Symbol	How it is helpful
Plus sign (+)	Search for things like blood type [ AB+ ] or for a Google+ page like [ +Chrome ]
"At" sign (@)	Find social tags like [ @google ] or [ @ladygaga]
Ampersand (&)	Find strongly connected ideas and phrases like [ Brothers & Sisters ] or [ A&E ]
Percent (%)	Search for a percent value like [ 40% of 80 ] or [ 10% of .1 ]
Dollar sign ($)	Indicate prices, so [ nikon 400 ] and [ nikon $400 ] give different results
Hashtag/number sign (#)	Search for trending topics indicated by hashtags like [ #lifewithoutgoogle ]
Dash (-)	Indicate that words around it are strongly connected as in [ twelve-year-old dog ] and [ cross-reference ]
Underscore symbol (_)	Connected two works like [ quick_sort ]. Your search results will find this pair of words either linked together (e.g., quicksort) or connected by an underscore (e.g., quick_sort).

Even though the symbols listed above are supported in search, including them in your searches doesn’t always improve the results. In these cases, you may see suggested results for that search without punctuation if those results seem more useful.

https://support.google.com/websearch/answer/2466433?hl=en