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