Perhaps you should try some spelling variations:
de letteratura » e letteratura, de litterature, de literatura
de litteratura » de litterature, de literatura, e letteratura
di letteratura » e letteratura, de literatura, della letteratura
i literatura » ii literatura, y literatura, i literature
grunde fir » grunde fur, grunde der, grunde die
livre i » livro i, livre 1, livre qui

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 fir ((((de letteratura) OR (de litteratura))) OR (di letteratura)) sarda ) OR ( i grand livre i literatura y )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grunde fir ((((de letteratura) OR (de litteratura))) or (di letteratura)) sarda ) or ( i grand livre i literatura y ))".
• Adding a wildcard symbol may retrieve word variants: (( i grunde fir ((((de letteratura) OR (de litteratura))) or (di letteratura)) sarda ) or ( i grand livre i literatura y ))*.