Perhaps you should try some spelling variations:
literatur greca » literatura graeca, literatura grega, literaturas grecia
la letteratura » la literatura, e letteratura, di letteratura
la litterature » a literature
grunde die » grunde der, grunde des, grundlage die
und libro » un libro, und librosa, und lido
libro e » libro de, libero e, libro i

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) OR (la litterature)) sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( _ und libro e literatur greca ) or ( i grunde die ((la letteratura) OR (la litterature)) sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( _ und libro e literatur greca ) or ( i grunde die ((la letteratura) OR (la litterature)) sarda ))*.