Perhaps you should try some spelling variations:
modells studien » modell studien, models studies, modell studie
e literatura » de literatura, y literatura, e literatur
osi modells » osi modell, osi model, pmi modells
5 filosofia » e filosofia, a filosofia, _ filosofia
y filosofia » e filosofia, a filosofia, la filosofia

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: "osi modells studien ((5 filosofia) OR (y filosofia)) e literatura".
• Adding a wildcard symbol may retrieve word variants: osi modells studien ((5 filosofia) OR (y filosofia)) e literatura*.