Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
de literature » de litterature, de lite'rature, de literatura
filosofia de » filosofia del
tests duale » tests due, tests scale, tests damage
3 filosofia » e filosofia, a filosofia, y filosofia
studien 3 » studien _, studien 4, studien 5