Perhaps you should try some spelling variations:
litterature sarda » letteratura sarda, litterature par, litterature serbe
letteratura del » letteratura e, letteratura di, literatura del
de letteratura » e letteratura, di letteratura, de litteratura
la litterature » a literature
grund libro » gran libro, und libro
grunde die » grunde der, grunde des, grundlage die
i grund » i ground, i grand
die la » die lan, die lage, die land

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 grund libro de letteratura del ) OR ( i grunde die la litterature sarda )).
• Adding a wildcard symbol may retrieve word variants: (( i grund libro de letteratura del ) or ( i grunde die la litterature sarda ))*.