PubMed automatically searches for phrases during Automatic Term Mapping.
When you are having trouble finding good MeSH vocabulary for a concept, forcing a phrase search to identify records containing a phrase, and then exploring how they are indexed can be a useful search technique. But...
Do NOT use quotes until you first try your search without them.
If you determine that you want to force a phrase search, you can do so by:
- Enclosing the phrase in double quotes:
Note: The absence of a search tag indicates the search should be conducted in All Fields.
- Entering the phrase with a search tag:
robotic surgery [tw]