Perhaps you should try some spelling variations:
pena literatura » pela literatura, na literatura, lengua literatura
en literatura » e literatura, en litterature, la literatura
8 filosofia » e filosofia, a filosofia, _ filosofia
y filosofia » e filosofia, a filosofia, la filosofia
texten das » texten des, texten der, text das

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: texten das studium ((8 filosofia) OR (y filosofia)) ((en literatura) OR (pena literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "texten das studium ((8 filosofia) or (y filosofia)) ((en literatura) OR (pena literatura))".
• Adding a wildcard symbol may retrieve word variants: texten das studium ((8 filosofia) or (y filosofia)) ((en literatura) OR (pena literatura))*.