Perhaps you should try some spelling variations:
litterature author » literature author, literature authors, temperature author
de litterature » la litterature, et litterature
e letteratura » y literatura, e literatur
di grande » da grande, a grande, e 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 author ) OR ( di grande riviere e letteratura e )).
• Adding a wildcard symbol may retrieve word variants: (( i gran libro de litterature author ) or ( di grande riviere e letteratura e ))*.