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

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: "test duale studies ds ((filosofica da) OR (filosofia da)) literatura".
• Adding a wildcard symbol may retrieve word variants: test duale studies ds ((filosofica da) OR (filosofia da)) literatura*.