Perhaps you should try some spelling variations:
orale studien » frage studien, scale studien, globale studien
duale studien » duale studium, scale studien, duales studium
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 (duale studien)) ds filosofia e literature".
• Adding a wildcard symbol may retrieve word variants: test ((orale studien) OR (duale studien)) ds filosofia e literature*.