that is easy to use. A good internal search feature should be capable of keyword or search-string searching.
An INTERNAL SEARCH FEATURE gives site users the option of searching just that site for the information they need. If you can not find what you want by using the site's menu options, go to its internal search feature and enter your keywords or search terms.
Look for a SEARCH or SEARCH THIS SITE button or bar among the menu options on the Web site.
If you don't see a search feature, check for a SITE MAP or SITE INDEX option. The SITE INDEX shows you how the site is organized. You can then browse through and select from the available menu options.
The next screen shows some examples of internal search features on Web sites: