See our PubMed Guide for help and tips.
Combine your search terms using Boolean operators to get results.
Boolean operators connect your search words together to either narrow or broaden your results in a database (like PubMed) or search engine (like Google Scholar).
Boolean operators are the words "AND", "OR" and "NOT".
Prefer a video? Watch this Boolean Operators tutorial.
See our Scopus guide for help and tips.
