Perhaps you should try some spelling variations:
da literature » a literature, da literatura, la literature
filosofia da » filosofia de, filosofia del, filosofia e
3 filosofia » e filosofia, a filosofia, y filosofia
text datei » text data, text dataset
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) OR (text daten)) studies 3 filosofia da literature".
• Adding a wildcard symbol may retrieve word variants: ((text datei) OR (text daten)) studies 3 filosofia da literature*.