Perhaps you should try some spelling variations:
letteratura greca » literatura graeca, letteratura fra, literatura grega
de letteratura » e letteratura, di letteratura, de litteratura
la letteratura » la litterature, e letteratura, di letteratura
la literatura » la litterature, a literature
grund libro » gran libro, und libro
grunde des » grund des, grunde der, grundzuge des
i grund » i ground, i grand

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 grund libro de letteratura greca ) OR ( i grunde des ((la letteratura) OR (la literatura)) sarda )).
• Adding a wildcard symbol may retrieve word variants: (( i grund libro de letteratura greca ) or ( i grunde des ((la letteratura) or (la literatura)) sarda ))*.