Perhaps you should try some spelling variations:
e literatura » de literatura, y literatura, e literatur
duale studie » duale studien, duale studium, duales studium
tests duale » tests due, tests scale, tests damage
1 filosofia » e filosofia, a filosofia, _ filosofia
y filosofia » e filosofia, a filosofia, la filosofia

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 duale studie ((1 filosofia) OR (y filosofia)) e literatura".
• Adding a wildcard symbol may retrieve word variants: tests duale studie ((1 filosofia) OR (y filosofia)) e literatura*.