Perhaps you should try some spelling variations:
litterature author » literature author, literature authors, temperature author
de litterature » la litterature, et litterature
grand libro » gran libro, grand livre
i grandde » i grunde, i grandi
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 libro de litterature author ) OR ( i grandde ((liberte de) OR (liberte du)) letteratura e )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grand libro de litterature author ) or ( i grandde ((liberte de) OR (liberte du)) letteratura e ))".
• Adding a wildcard symbol may retrieve word variants: (( i grand libro de litterature author ) or ( i grandde ((liberte de) OR (liberte du)) letteratura e ))*.