Perhaps you should try some spelling variations:
letteratura fra » letteratura da, letteratura greca, letteratura sarda
la letteratura » la litterature, di letteratura, della letteratura
e letteratura » y literatura, e literatur
la literatura » la litterature, a literature
grund libro » gran libro, und libro
grunde fir » grunde fur, grunde der, grunde die
i grund » i ground, i grand
libro e » libro de, libero e, libro i

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 grund libro e letteratura fra ) OR ( i grunde fir ((la letteratura) OR (la literatura)) sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i grund libro e letteratura fra ) or ( i grunde fir ((la letteratura) OR (la literatura)) sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i grund libro e letteratura fra ) or ( i grunde fir ((la letteratura) OR (la literatura)) sarda ))*.