Perhaps you should try some spelling variations:
literatura graeca » literatura alema, literatura oral
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
literatur greca » literatura grega, literaturas grecia, literature greece
la letteratura » la litterature, la literatura, e letteratura
grunde die » grunde der, grunde des, grundlage die
libro e » libro de, libero e, libro _
libro i » libro di, libro 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 ((libro e) OR (libro i)) ((literatur greca) OR (literatura graeca)) ) OR ( i grunde die la letteratura sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i und ((libro e) OR (libro i)) ((literatur greca) or (literatura graeca)) ) or ( i grunde die la letteratura sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i und ((libro e) OR (libro i)) ((literatur greca) or (literatura graeca)) ) or ( i grunde die la letteratura sarda ))*.