allintext

Searches for occurrences of all the keywords given.

intext

Searches for the occurrences of keywords all at once or one at a time.

inurl

Searches for a URL matching one of the keywords.

allinurl

Searches for a URL matching all the keywords in the query.

intitle

Searches for occurrences of keywords in title all or one.

allintitle

Searches for occurrences of keywords all at a time.

site

Specifically searches that particular site and lists all the results for that site.

filetype

Searches for a particular filetype mentioned in the query.

link

Searches for external links to pages.

numrange

Used to locate specific numbers in your searches.

before

Used to search within a particular date range.

after

Used to search within a particular date range.

allinanchor

This shows sites which have the keyterms in links pointing to them, in order of the most links.

inanchor

This shows sites which have the keyterms in links pointing to them, in order of the most links.

allinpostauthor

Exclusive to blog search, this one picks out blog posts that are written by specific individuals.

inpostauthor

Exclusive to blog search, this one picks out blog posts that are written by specific individuals.

related

List web pages that are “similar” to a specified web page.

cache

Shows the version of the web page that Google has in its cache.