Perhaps you should try some spelling variations:
litterature sarda » letteratura sarda, litterature par, litterature serbe
literatur greca » literatura graeca, literatura grega, literaturas grecia
la litterature » a literature
und libero » un libero, und libro, und liberal
grunde die » grunde der, grunde des, grundlage die
libero e » libro e, libera me, liber de
die la » die lan, die lage, die land
i und » _ und, 1 und, 2 und

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 und libero e literatur greca ) OR ( i grunde die la litterature sarda )).
• Adding a wildcard symbol may retrieve word variants: (( i und libero e literatur greca ) or ( i grunde die la litterature sarda ))*.