If you want to search for a phrase, enclose it in quotation marks. For example: 'Miguel de Cervantes'.
In each field you can enter one or more words; the operator that links the terms is AND.
The characters * and? they look for terms that share the same root or words of doubtful spelling. For example: 'ilustr *', will retrieve the words illustrator, illustrations, illustrated, illustrative, etc .; and 'primiti? a' will recover the terms primitive and primitiua. These characters should not be used as the start of a search term.