Perhaps you should try some spelling variations:
modell studien » model studies, models studies, moderne studien
le literatura » la literatura, e literatura, de litteratura
de literatura » de litterature, la literatura, y literatura
rosi modell » osi modell, osi model, osi modells
e filosofia » la filosofia
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 ((le literatura) OR (de literatura))".
• Adding a wildcard symbol may retrieve word variants: rosi modell studien e filosofia ((le literatura) OR (de literatura))*.