Perhaps you should try some spelling variations:
orale studien » duale studien, scale studien, globale studien
frage studien » lage studien, frage stellen, erste studien
ds filosofia » di filosofia, de filosofia, da filosofia
e literature » e literatur, life literature, prose literature
filosofia e » filosofia de, filosofia del

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: "test ((orale studien) OR (frage studien)) ds filosofia e literature".
• Adding a wildcard symbol may retrieve word variants: test ((orale studien) OR (frage studien)) ds filosofia e literature*.