Perhaps you should try some spelling variations:
litterature sarda » letteratura sarda, litterature par, litterature serbe
letteratura fra » letteratura da, letteratura greca, letteratura sarda
de letteratura » e letteratura, di letteratura, de litteratura
la litterature » a literature
grundlage die » grundlagen die, grundlage der, grundlage einer
grundlage des » grundlagen des, grundlage der, grundlage fur
grund libro » gran libro, und libro
i grund » i grunde, 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 fra ) OR ( i ((grundlage die) OR (grundlage des)) la litterature sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grund libro de letteratura fra ) or ( i ((grundlage die) OR (grundlage des)) la litterature sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i grund libro de letteratura fra ) or ( i ((grundlage die) OR (grundlage des)) la litterature sarda ))*.