Perhaps you should try some spelling variations:
del letteratura » della letteratura, di letteratura, de litteratura
literatura de » literatura y, literatura en
e letteratura » y literatura, e literatur
v literatura » y literatura, v literatur, a literatura
grand libri » grand livre, gran libro, amandi libri
mandi libro » amandi libri
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 grand libri v literatura de ) OR ( _ mandi libro ((del letteratura) OR (e letteratura)) sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grand libri v literatura de ) or ( _ mandi libro ((del letteratura) OR (e letteratura)) sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i grand libri v literatura de ) or ( _ mandi libro ((del letteratura) OR (e letteratura)) sarda ))*.