Perhaps you should try some spelling variations:
e filosofico » e filosofica, y filosofico, e filosofiche
filosofico a » filosofico e, filosofica da, filosofico de
a literatura » la literatura, a literature, y literatura
1 studies » 2 studies, 4 studies, 3 studies
1 studie » 1 studien, 3 studie, 11 studies

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