Perhaps you should try some spelling variations:
letteratura sulla » letteratura russa, letteratura del
letteratura sarda » letteratura storia, letteratura arte, letteratura arti
literatura de » literatura en
grunde libre » grunde liegen, grunde die, france libre
libre de » libro de
livre i » livro i, livre 1, livre qui

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 grunde libre de ((letteratura sarda) OR (letteratura sulla)) ) OR ( i grand livre i ((literatura de) OR (literatura y)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grunde libre de ((letteratura sarda) OR (letteratura sulla)) ) or ( i grand livre i ((literatura de) or (literatura y)) ))".
• Adding a wildcard symbol may retrieve word variants: (( i grunde libre de ((letteratura sarda) OR (letteratura sulla)) ) or ( i grand livre i ((literatura de) or (literatura y)) ))*.