Perhaps you should try some spelling variations:
modell studien » model studies, models studies, moderne studien
la litterature » a literature
delle studien » duale studien, delphi studien, welche studien
filosofia la » filosofia da, filosofia le, filosofica da
5 filosofia » e filosofia, a filosofia, y 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: "tesi ((delle studien) OR (modell studien)) 5 filosofia la litterature*".