Perhaps you should try some spelling variations:
della letteratura » nella letteratura, e letteratura
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
del literatura » de literatura, pela literatura, da literatura
literatura de » literatura y, literatura en
grunde libro » grunde gibt, und libro
grunde fir » grunde fur, grunde der, grunde die
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 ( i ((((grunde libro) OR (grunde fir))) 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 ( i ((((grunde libro) OR (grunde fir))) or (gran libro)) della letteratura sarda ))*".