Perhaps you should try some spelling variations:
della letteratura » nella letteratura, e letteratura
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
literatura de » literatura y
literatura en » literatura y
grunde libro » grunde fir, grunde gibt, und libro
i grundei » i grunde, i grund
libri del » libro del, libri de, libri duo

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: (( i grundei libri del ((literatura de) OR (literatura en)) ) OR ( i ((grunde libro) OR (gran libro)) della letteratura sarda ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grundei libri del ((literatura de) OR (literatura en)) ) or ( i ((grunde libro) or (gran libro)) della letteratura sarda ))*".