Search for one or more terms in one or more fields linked by different operators. And: search for the records containing all the terms in the different search fields; Or: search for the records containing any of the specified terms; No: search for the records containing the first specified term, but not the second.

The signs * and ? search terms with common root or words with doubtful spelling. For instance: "ilustr*" will deliver the words "ilustrador", "ilustraciones", "ilustrada", ilustrativo, etc.; And"primiti?a" will deliver the terms primitiva and primitua. These signs must not be used as a start These signs must not be used as a start for a search term.