Perhaps you should try some spelling variations:
modell studien » model studies, models studies, moderne studien
filosofia la » filosofia da, filosofica da, filosofia das
filosofia le » filosofia de, filosofia e, filosofia del
rosi modell » osi modell, osi model, osi modells
studien e » studien es, studien _, studien 3

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: "rosi modell studien e ((filosofia la) OR (filosofia le)) literatura".
• Adding a wildcard symbol may retrieve word variants: rosi modell studien e ((filosofia la) OR (filosofia le)) literatura*.