Most databases don't understand the natural language we speak and need help understanding what we're looking to find. For this, they require a special set of conventions, including: Logical or Boolean operators, wildcard and truncation symbols, and nesting. Databases and internet search engines apply these rules differently, so check the HELP files in the database you are using to find out more.
Boolean Logic consists of three logical operators (connectors): AND, OR and NOT
Nesting search terms using: parenthesis ( )
Boolean Operator: NOT
Phrases: " "