In both simple and advanced search you can use the Boolean operators AND, OR and NOT. These must be written in capital letters.

AND

Without operators, the search terms are automatically combined with AND. This make all search terms appear in the results. Be aware that the words can be in the table of content and not in the bibliographic record.

OR

At least one of the search terms linked with OR must appear in the results. For example, use OR to combine related terms in order to expand the search to several terms (synonyms, different spellings):

NOT

The search term excluded with NOT must not appear in the results. In other words, NOT enables words or phrases to explicitly be excluded.