Perhaps you should try some spelling variations:
la litterature » a literature
delle studium » duale studium, duales studium, dualen studium
de filosofia » e filosofia, di filosofia, a filosofia
test delle » testi delle, tesi delle, test della

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 delle studium ((de filosofia) OR (la filosofia)) la litterature".
• Adding a wildcard symbol may retrieve word variants: test delle studium ((de filosofia) OR (la filosofia)) la litterature*.