## Boolean operators

With the Boolean operators AND, OR and NOT you can combine search terms, search for multiple terms at one or exclude certain terms..

AND The AND-operator allows you to combine search terms. If you use AND between two search terms, the database will only give you results with both search terms.

OR The OR-operator allows you to find results containing the one or the other term, or both. Useful for synonyms, abbreviations and related terms! Take note: Always place search terms combined with OR between rounded brackets.

NOT The NOT-operator allows you to exclude certain results.