Perhaps you should try some spelling variations:
filosofico a » filosofico e, filosofica da, filosofico de
e filosofico » e filosofica, y filosofico, e filosofiche
a literatura » la literatura, a literature, y literatura
3 studies » 2 studies, 4 studies
3 studie » 3 studien, 1 studie, 13 studies

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: test ((3 studie) OR (3 studies)) e filosofico a literatura.
• Adding a wildcard symbol may retrieve word variants: test ((3 studie) or (3 studies)) e filosofico a literatura*.