Perhaps you should try some spelling variations:
delle studien » duale studien, delphi studien, modell studien
le literatura » la literatura, de literatura, de litteratura
e literatura » de literatura, y literatura, e literatur
3 filosofia » e filosofia, a filosofia, y filosofia
tesi delle » testi delle, test delle, testi della
studien 3 » studien _, studien 4, studien 5

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 3 filosofia ((le literatura) OR (e literatura))".
• Adding a wildcard symbol may retrieve word variants: tesi delle studien 3 filosofia ((le literatura) OR (e literatura))*.