Perhaps you should try some spelling variations:
de litterature » et litterature
la litterature » a literature
e letteratura » y literatura, e literatur
di grande » de grande, da grande, _ grande
riviere e » riviere de, riviere p, riviere _
i gran » i grand, i grain, i 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 gran libro ((de litterature) OR (la litterature)) author ) OR ( di grande riviere e letteratura e )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i gran libro ((de litterature) OR (la litterature)) author ) or ( di grande riviere e letteratura e ))".
• Adding a wildcard symbol may retrieve word variants: (( i gran libro ((de litterature) OR (la litterature)) author ) or ( di grande riviere e letteratura e ))*.