Perhaps you should try some spelling variations:
lengua literatura » lingual literature, language literature, la literatura
pena literatura » pela literatura, na literatura, la literatura
quito durante » quae durante, texto durante, vivo durante
3 filosofia » e filosofia, a filosofia, y filosofia
studien 3 » studien _, studien 4, studien 5

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: ((quito duale) OR (quito durante)) studien 3 filosofia ((pena literatura) OR (lengua literatura)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((quito duale) OR (quito durante)) studien 3 filosofia ((pena literatura) or (lengua literatura))".
• Adding a wildcard symbol may retrieve word variants: ((quito duale) OR (quito durante)) studien 3 filosofia ((pena literatura) or (lengua literatura))*.