Perhaps you should try some spelling variations:
der filosofia » de filosofia, e filosofia, di filosofia
allo studio » lo studio
filosofia a » filosofia da, filosofia la, filosofia e
studio der » studio del, studio dei, estudio del

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 OR teso) allo studio der filosofia a literature*".