Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, da literatura
duale studien » duale studium, scale studien, duales studium
di filosofia » la filosofia, e filosofia
texto duale » texto durante
studien di » studien die, studien dd, studien der

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

• Adding a wildcard symbol may retrieve word variants: texto duale studien di filosofia del literatura*.