Perhaps you should try some spelling variations:
delle studies » delay studies, delhi studies, creole studies
ds filosofica » di filosofia, de filosofia, da filosofia
de literatura » de litterature, y literatura, a literatura
la literatura » la litterature, a literature
tesi delle » testi delle, test delle, testi della

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 studies ds filosofica ((de literatura) OR (la literatura))".
• Adding a wildcard symbol may retrieve word variants: tesi delle studies ds filosofica ((de literatura) OR (la literatura))*.