Perhaps you should try some spelling variations:
et letteratura » et litterature, di letteratura, la letteratura
de literatura » de litterature, la literatura, y literatura
literatura de » literatura y, literatura en
e letteratura » y literatura, e literatur
gramd livre » grand livre, grande livre, grands livres
gram libro » gran libro
i gramd » i grand, i grandi, i graded
i gram » bi 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 gram libro de literatura de ) OR ( i gramd livre ((et letteratura) OR (e letteratura)) sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i gram libro de literatura de ) or ( i gramd livre ((et letteratura) OR (e letteratura)) sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i gram libro de literatura de ) or ( i gramd livre ((et letteratura) OR (e letteratura)) sarda ))*.