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