The simplest way to search is to just type in what you are looking for.
However, you can also use AND, OR, NOT, parentheses and * (as a wild card) to refine your search.
For example:
- information retrieval
- finds documents containing 'information' or 'retrieval'
- information or retrieval
- same as above
- information and retrieval
- finds documents containing both 'information' and 'retrieval'
- information not retrieval
- finds documents containing 'information' but not 'retrieval'
- (information not retrieval) and WAIS
- finds documents containing 'WAIS', plus 'information' but not 'retrieval'
- Bren*
- finds documents containing words starting with 'Bren'