The techniques below can help you expand or limit your search and retrieve more relevant results.

Boolean operators--the words  AND, OR, NOT--are used to connect ideas.

AND
The Boolean operator AND (can be upper or lower case) will find all articles that contain both ideas connected by the operator.

Example: France and trains

In this example, the computer will limit search results to articles about trains in France.  Each article will contain both words.

OR
The Boolean operator OR (can be upper or lower case) will expand the number of articles you find.

Example: Cats or felines

In this example, the computer will find articles with the words cats or felines or both.  Some articles will only mention cats, others will only mention felines, and others will mention both.

NOT
The Boolean operator NOT (can be upper or lower case) will find articles that contain only one idea but not another.

Example: Jordan not Michael

In this example, the computer will find articles about Jordan that do not mention the name Michael.  These might include articles about the country Jordan or other people with that name.