Perhaps you should try some spelling variations:
litterature author » literature author, literature authors, temperature author
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
du letteratura » di letteratura, su letteratura, sua letteratura
i litterature » i litteraturen, i literature, _ litterature
de liberte » la liberte, de libre
libro i » libro di, libro de

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