Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
y filosofia » e filosofia, a filosofia, la filosofia
e studies » age studies, e studi, e studio
e studie » e studi, e studio, die studie

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 ((e studie) OR (e studies)) y filosofia ((y literatura) OR (la literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "test ((e studie) or (e studies)) y filosofia ((y literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: test ((e studie) or (e studies)) y filosofia ((y literatura) OR (la literatura))*.