Perhaps you should try some spelling variations:
litterature sarda » letteratura sarda, litterature par, litterature serbe
letteratura fra » letteratura da, letteratura greca, letteratura sarda
de letteratura » e letteratura, di letteratura, de litteratura
groundlage die » grundlage die, grundlagen die, grundlager die
la litterature » a literature
ground libro » ground air, ground links, ground link
i groundlage » i grundlage, i grundlagen, 1 grundlage
i ground » i group, i groups, i grunde
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 ground libro de letteratura fra ) OR ( i groundlage die la litterature sarda )).
• Adding a wildcard symbol may retrieve word variants: (( i ground libro de letteratura fra ) or ( i groundlage die la litterature sarda ))*.