Perhaps you should try some spelling variations:
date studies » dante studies, data studies, fate studies
rate studies » rat studies, state studies, case studies
rats studies » rat studies, his studies
a literatura » la literatura, a literature, y literatura
3 filosofia » a filosofia, y filosofia, _ filosofia
e filosofia » la filosofia

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: texto ((date studies) OR (((rate studies) OR (rats studies)))) ((3 filosofia) OR (e filosofia)) a literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "texto ((date studies) or (((rate studies) OR (rats studies)))) ((3 filosofia) or (e filosofia)) a literatura".
• Adding a wildcard symbol may retrieve word variants: texto ((date studies) or (((rate studies) OR (rats studies)))) ((3 filosofia) or (e filosofia)) a literatura*.