Perhaps you should try some spelling variations:
del literatura » de literatura, pela literatura, e literatura
da literatura » la literatura, a literatura, de literatura
studium 8 » studium _, studium 1, studium im
studium 3 » studium _, studium 1, studium im
texto » textos, text, texts

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: texto duales ((studium 8) OR (studium 3)) filosofia ((del literatura) OR (da literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "texto duales ((studium 8) OR (studium 3)) filosofia ((del literatura) or (da literatura))".
• Adding a wildcard symbol may retrieve word variants: texto duales ((studium 8) OR (studium 3)) filosofia ((del literatura) or (da literatura))*.