Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, a literatura
da filosofia » la filosofia, di filosofia, a filosofia
y literatura » la literatura
de studium » dem studium, des studium, d studium
studium da » studium das, studium a, studium d

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 de studium da filosofia ((de literatura) OR (y literatura))".
• Adding a wildcard symbol may retrieve word variants: est de studium da filosofia ((de literatura) OR (y literatura))*.