Perhaps you should try some spelling variations:
litterature author » literature author, literature authors, temperature author
letteratura arti » letteratura arte, letteratura sarda, letteratura di
de litterature » la litterature, et litterature
e letteratura » y literatura, e literatur
dei grani » dei grandi, dei gratia
libero e » libro e, libera me, liber de
i grani » i grandi, i grand, de grani
i gran » i grand, i grain, i gram

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 ( ((i grani) OR (dei grani)) libero e letteratura arti )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i gran libro de litterature author ) or ( ((i grani) OR (dei grani)) libero e letteratura arti ))".
• Adding a wildcard symbol may retrieve word variants: (( i gran libro de litterature author ) or ( ((i grani) OR (dei grani)) libero e letteratura arti ))*.