Perhaps you should try some spelling variations:
la letteratura » la litterature, e letteratura, di letteratura
de literatura » de litterature, y literatura, a literatura
la literatura » la litterature, a literature
grunde die » grunde der, grunde des, grundlage die
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 literatura y ) OR ( i grunde die ((la letteratura) OR (la literatura)) sarda ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i gran libro de literatura y ) or ( i grunde die ((la letteratura) OR (la literatura)) sarda ))*".