Perhaps you should try some spelling variations:
duale studium » duales studium, dualen studium, das studium
des filosofia » de filosofia, e filosofia, da filosofia
di filosofia » la filosofia, e filosofia
tests duale » tests due, tests scale, tests damage

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: "tests duale studium ((des filosofia) OR (di filosofia)) a literature".
• Adding a wildcard symbol may retrieve word variants: tests duale studium ((des filosofia) OR (di filosofia)) a literature*.