Perhaps you should try some spelling variations:
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
la letteratura » la litterature, la literatura, e letteratura
grund libro » gran libro, und libro
grunde fir » grunde fur, grunde der, grunde die
i grund » i ground, i grand
fir la » fuir la

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