Perhaps you should try some spelling variations:
duales studium » das studium
la litterature » a literature
cases studium » cases studies, cases studied, case studies
di filosofia » la filosofia, e filosofia
filosofia la » filosofia da, filosofia le, filosofica da

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: "texts ((cases studium) OR (duales studium)) di filosofia la litterature*".