Perhaps you should try some spelling variations:
duale studies » duale studien, scale studies, duale studium
da literature » a literature, da literatura, la literature
da filosofia » di filosofia, a filosofia, de filosofia
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 ((da filosofia) OR (la filosofia)) da literature".
• Adding a wildcard symbol may retrieve word variants: test duale studies ((da filosofia) OR (la filosofia)) da literature*.