Perhaps you should try some spelling variations:
modell studien » model studies, models studies, moderne studien
della studien » cella studie, delphi studien, della studiosa
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
a filosofia » la filosofia, e filosofia, di 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: "testi ((della studien) OR (modell studien)) a filosofia la literatura".
• Adding a wildcard symbol may retrieve word variants: testi ((della studien) OR (modell studien)) a filosofia la literatura*.