Perhaps you should try some spelling variations:
nella letteratura » e letteratura
della letteratura » e letteratura
i grandi » i grand, dei grandi, le grandi
e grandi » le grandi, de grandi, e grande
i grani » i grand, dei grani, de grani

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 grandi) OR (e grandi))) OR (i grani)) libri ((nella letteratura) OR (della letteratura)) arti.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((i grandi) OR (e grandi))) or (i grani)) libri ((nella letteratura) or (della letteratura)) arti".
• Adding a wildcard symbol may retrieve word variants: ((((i grandi) OR (e grandi))) or (i grani)) libri ((nella letteratura) or (della letteratura)) arti*.