Perhaps you should try some spelling variations:
de literatura » de litterature, a literatura
la literatura » la litterature, a literature
des studium » des studiums, das studium, dem studium
studium la » studium a, studium als, studium das
text des » text der

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