Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
duale studies » duale studien, scale studies, duale studium
ds filosofia » di filosofia, de filosofia, da filosofia
test duale » test double, test delle, test orale

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: test duale studies ds filosofia del literatura*.