Perhaps you should try some spelling variations:
la literatura » la litterature, a literature
filosofia la » filosofia da, filosofia le, filosofica da
estudio del » estudios del, estudio de, estudios de
tesi dello » testi della, testi delle, mesi dell
tesi delle » testi delle, test delle, testi della
studio der » studio oder, studio del, studio dei

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tesi dello) OR (tesi delle)) ((studio der) OR (estudio del)) filosofia la literatura*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tesi dello) or (tesi delle)) ((studio der) OR (estudio del)) filosofia la literatura*".