Perhaps you should try some spelling variations:
litterature author » literature author, literature authors, literature anthony
letteratura arte » letteratura arti, letteratura sarda, letteratura e
et litterature » la litterature, art literature
du letteratura » di letteratura, su letteratura, sua letteratura
di grande » de grande, da grande, _ grande
libro et » libero et, libre et, libro e
i grande » i grunde, i grand, i grandi
i gran » i grand, i grain, i grani

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