Perhaps you should try some spelling variations:
e filosofico » e filosofica, y filosofico, e filosofiche
a literatura » la literatura, y literatura, a literatur
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 literatura) OR (a literature))".
• Adding a wildcard symbol may retrieve word variants: test 1 studie e filosofico ((a literatura) OR (a literature))*.