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

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

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