You may use more than one operator in a command line.
Examples: science AND (elementary OR primary)
(games OR play) AND (early childhood OR preschool)
Notes:
- Search terms/phrases and operators are not case-sensitive.
- Search statement is processed from left to right except when brackets (parentheses) are used.
- Commands within brackets are executed first.
- The results will then be combined with other search terms/phrases.
- Order of processing: brackets, proximity operators, NOT, AND, OR.
