Perhaps you should try some spelling variations:
literature sarda » literature search, letteratura sarda, literature sacred
letteratura fra » letteratura da, letteratura greca, letteratura sarda
de letteratura » e letteratura, di letteratura, de litteratura
grundlage die » grundlagen die, grundlage der, grundlage des
grund libro » gran libro, und libro
i grundlage » i grundlagen, ii grundlage, 1 grundlage
i grund » i grunde, i ground, i grand
die a » die _, die 7, die 5

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 fra ) OR ( i grundlage die a literature sarda )).
• Adding a wildcard symbol may retrieve word variants: (( i grund libro de letteratura fra ) or ( i grundlage die a literature sarda ))*.