Perhaps you should try some spelling variations:
litterature author » literature author, literature authors, literature anthony
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
grundede liberte » grande liberte
du letteratura » di letteratura, su letteratura, sua letteratura
i grundede » i grundidee, i grundideen
libro i » libro di

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 grunde ((libro i) OR (libro de)) litterature author ) OR ( i grundede liberte du letteratura sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grunde ((libro i) OR (libro de)) litterature author ) or ( i grundede liberte du letteratura sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i grunde ((libro i) OR (libro de)) litterature author ) or ( i grundede liberte du letteratura sarda ))*.