Perhaps you should try some spelling variations:
a literatura » la literatura, a literature, y literatura
3 filosofia » a filosofia, y filosofia, _ filosofia
e filosofia » la filosofia
texto date » text data, text daten, texto de
text datei » text daten, text data, text dataset

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) OR (text datei)) studies ((3 filosofia) OR (e filosofia)) a literatura.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((texto date) OR (text datei)) studies ((3 filosofia) or (e filosofia)) a literatura".
• Adding a wildcard symbol may retrieve word variants: ((texto date) OR (text datei)) studies ((3 filosofia) or (e filosofia)) a literatura*.