Perhaps you should try some spelling variations:
nella letteratura » e letteratura
della letteratura » e letteratura
grani libri » gran libro, amandi libri
i grani » i grandi, i grand, dei 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 grani libri ((della letteratura) OR (nella letteratura)) arti.
• Adding a wildcard symbol may retrieve word variants: i grani libri ((della letteratura) or (nella letteratura)) arti*.