Use Boolean logic to narrow, broaden, or refine the search results.
- AND
- Intersection
- Search for two terms or phrases in the same document
- Example: stormwater AND bioswale
![](https://libapps.s3.amazonaws.com/accounts/204249/images/Boolean_AND.PNG)
- OR
- Inclusion
- Search for either term or phrase separately as well as together
- Example: phosphorous-phosphate OR nitrogen-nitrate
![](https://libapps.s3.amazonaws.com/accounts/204249/images/Boolean_OR.PNG)
- NOT
- Exclusion
- Remove the search term or phrase from the results
- Example: math union NOT labor
![](https://libapps.s3.amazonaws.com/accounts/204249/images/Boolean_NOT.PNG)
Video: https://www.youtube.com/watch?v=bCAULDuMcso
- Phrase searching (using quotations around phrases or titles)
- Examples:
- "stormwater quality conditions"
- "drinking water"
- "E. coli"
- "Water Filtration Practices : Including Slow Sand Filters And Precoat Filtration"
- Truncation: Search for variations in a word by using an asterisk
- Examples:
- filt*
- filter
- filtration
- filters
- filtering
- filters
- child*
- Parenthesis: Grouping key search terms/phrases
- Examples:
- drinking water AND (law OR policy OR regulation)
- water filt* AND (e. coli OR "escherichia coli")
Video: https://www.youtube.com/watch?v=Ed7EswsnEbM