Perhaps you should try some spelling variations:
duales studium » das studium
en literatura » e literatura, pena literatura, en litterature
8 filosofia » e filosofia, a filosofia, _ filosofia
y filosofia » e filosofia, a filosofia, la filosofia
texto » textos, text, texts

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: "texto duales studium ((8 filosofia) OR (y filosofia)) en literatura".
• Adding a wildcard symbol may retrieve word variants: texto duales studium ((8 filosofia) OR (y filosofia)) en literatura*.