Perhaps you should try some spelling variations:
duale studien » duale studium, scale studien, duales studium
da literature » a literature, da literatura, la literature
filosofia da » filosofia de, filosofia del, filosofia e
3 filosofia » e filosofia, a filosofia, y filosofia
test duale » test double, test delle, test orale
studien 3 » studien _, studien 4, studien 5