OR
List pages which have at least some of the keywords

+
Insist that the search engine includes a given keyword in the search results

-
Insist that the search engine omits pages which match a given keyword in the search results

~
Enhance a search to include synonyms for a given keyword

*
Include a wildcard match in your search results

""
Restrict a search so that the keywords must appear consecutively in a phrase

link:
List pages which link to a page

cache:
Show the cached snapshot of a page

related:
List pages which Google consider to be related to another

info:
Find one specific URL in the search database

define:
Show Google's glossary definition for a term

stocks:
Show American stockmarket information for a given ticker symbol

site:
Restrict a search to a single site

allintitle:
Restrict a search so that all the keywords must appear in the title

intitle:
Restrict a search so that some of the keywords must appear in the title

allintext:
Restrict a search so that all of the keywords must appear in the body text

allinurl:
Restrict a search so that all of the keywords must appear in the page address

inurl:
Restrict a search so that some keywords must appear in the page address

daterange:
Restrict a search to any timeframe


date:
Restrict a search to a recent timeframe

safesearch:
Restrict a search to exclude adult-content

filetype:
Restrict a search to a given type of file

[#]...[#]
Search a range of numbers as a keyword