Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
di filosofia » la filosofia, e filosofia
a filosofia » la filosofia, e filosofia
d studium » _ studium, 2 studium, 4 studium
est d » est de, test d, est ad

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: "est d studium ((a filosofia) OR (di filosofia)) la literatura".
• Adding a wildcard symbol may retrieve word variants: est d studium ((a filosofia) OR (di filosofia)) la literatura*.