Perhaps you should try some spelling variations:
filosofia pena » filosofia para, filosofia della, filosofia parfa
duale studien » duale studium, scale studien, duales studium
filosofia en » filosofia e, filosofia del, filosofia con
quito duale » quito durante
studien 5 » studien _, studien 3, studien 4

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: "quito duale studien 5 ((filosofia pena) OR (filosofia en)) literatura".
• Adding a wildcard symbol may retrieve word variants: quito duale studien 5 ((filosofia pena) OR (filosofia en)) literatura*.