Perhaps you should try some spelling variations:
duales studium » das studium
de litterature » la litterature, et litterature
des filosofia » de filosofia, di filosofia, da filosofia
tests duales » tests dalekjs, tests des, neues duales
e filosofia » la filosofia

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 duales studium ((des filosofia) OR (e filosofia)) de litterature*".