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