Perhaps you should try some spelling variations:
filosofico a » filosofica da, filosofico de, filosofico di
filosofico e » filosofica e, filosofici e, filosofia e
1 studie » 1 studies, 1 studien, 3 studie
studie e » studie 2, studie _, studie 1
test 1 » test 2, test 3

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 1 studie e ((filosofico a) OR (filosofico e)) literatura".
• Adding a wildcard symbol may retrieve word variants: test 1 studie e ((filosofico a) OR (filosofico e)) literatura*.