Google lets you narrow your search down to within a specific website, or to within a specific Top Level Domain (TLD), for example
You can do this by using the
site: command in your search, for example:
java site:sun.com- searches for “java” on sites with the domain name sun.com (this includes subdomains, like java.sun.com)
java site:java.sun.com- more specific; searches for “java” on sites with the domain name java.sun.com.
copyright site:gov- searches all US government sites (domain names ending in
.gov) for the term “copyright”.