Most search engines allow for the refining of a search by using certain Boolean Logic Operators to include and exclude various words and phrases. The "AND" (always capitalize in almost all search engines) join two words and/or phrases together. If one orders "eggs and ham" at a cafe, one gets both on the plate. One can not have "eggs and ham" with only "eggs" or "ham". Both must be present.

For example, a search for "paul" and "corinth" would have to include both as the following page shows. Click on AltaVisa Advance Search to see the results.

Notice both "paul" and "corinth" went into the search box and were treated equally in the ranking of their importance. However, the Boolean expression box contained both "paul" and "corinth" and the Boolean Logic Operator "AND", so both word must appear on a web page to be listed in the results. Notice on the last page near the bottom. the word "corinth" appeared on 61,099 web pages and the word "paul" appeared 7,269,568 times. But on the first page of the results the two words appeared on the same web page only 11,733 times. But which Paul and which Corinth (item three has Corinth, Mississippi). Notice that the two words appeared in the title of the first three cites in the result listing.