Perhaps you should try some spelling variations:
e literatura » de literatura, y literatura, e literatur
1 filosofia » e filosofia, a filosofia, y filosofia
tests duale » tests scale, tests damage
filosofia e » filosofia de, filosofia del
tests due » tests die, tests de, tests drug
studie 1 » studie 2, studie _

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