Perhaps you should try some spelling variations:
y filosofia » e filosofia, a filosofia, la filosofia
filosofia a » filosofia da, filosofia la, filosofia e
text datei » text data, text dataset
text daten » text data, text dataset
studies y » studies 2, studies 1, studies 0

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: ((text datei) OR (text daten)) studies y filosofia a literature.
• Adding a wildcard symbol may retrieve word variants: ((text datei) or (text daten)) studies y filosofia a literature*.