While searching a database the search strategy may have to be refined, as it is very common to retrieve too many or too few references on the first attempt.
If you find too few references....
Increase your number of results by using the following methods:
- Use synonyms or related terms combined with OR.
- Use truncation to find plurals and other variations
If you find too many references...
Decrease them as follows:
- Combine keywords with AND or NOT.
- Limit the search to specified fields such as title or year of publication.