Perhaps you should try some spelling variations:
di letteratura » de literatura, della letteratura
e letteratura » y literatura, e literatur
literatura de » literatura en
grand libro » gran libro, grand livre
i ground » i groups, i grunde
libro di » libro de, libri di, libro del
i grand » i grunde

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 ground) OR (i group)) libri ((di letteratura) OR (e letteratura)) sarda ) OR ( i grand libro di ((literatura de) OR (literatura y)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((i ground) or (i group)) libri ((di letteratura) OR (e letteratura)) sarda ) or ( i grand libro di ((literatura de) or (literatura y)) ))".
• Adding a wildcard symbol may retrieve word variants: (( ((i ground) or (i group)) libri ((di letteratura) OR (e letteratura)) sarda ) or ( i grand libro di ((literatura de) or (literatura y)) ))*.