Perhaps you should try some spelling variations:
letteratura sulla » letteratura russa, letteratura del
literatur greca » literatura graeca, literatura grega, literaturas grecia
la letteratura » la litterature, la literatura, e letteratura
grunde die » grunde der, grunde des, grundlage die
und libro » un libro, und librosa, und lido
libro e » libro de, libero e, libro i
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: (( _ und libro e literatur greca ) OR ( i grunde die la letteratura sulla )).
• Adding a wildcard symbol may retrieve word variants: (( _ und libro e literatur greca ) or ( i grunde die la letteratura sulla ))*.