Perhaps you should try some spelling variations:
duo letteratura » di letteratura, su letteratura, uso letteratura
sua letteratura » su letteratura, la letteratura, tra letteratura
i literatura » ii literatura, y literatura, i literature
i grundei » i grunde, i grund
libro i » libro di, libro de
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 grundei libri ((duo letteratura) OR (sua letteratura)) russa ) OR ( i gran libro i literatura y )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grundei libri ((duo letteratura) OR (sua letteratura)) russa ) or ( i gran libro i literatura y ))".
• Adding a wildcard symbol may retrieve word variants: (( i grundei libri ((duo letteratura) OR (sua letteratura)) russa ) or ( i gran libro i literatura y ))*.