Perhaps you should try some spelling variations:
scale studien » scale studies, scale student, soziale studien
duale studien » duale studium, duales studium, dualen studium
di filosofia » la filosofia, e filosofia
filosofia a » filosofia da, filosofia la, filosofia e

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: "tests ((scale studien) OR (duale studien)) di filosofia a literature".
• Adding a wildcard symbol may retrieve word variants: tests ((scale studien) OR (duale studien)) di filosofia a literature*.