Perhaps you should try some spelling variations:
literatura sarda » letteratura sarda, literatura arab, literatura fakta
literatur greca » literatura graeca, literatura grega, literaturas grecia
la literatura » la litterature, a literature
grund libro » gran libro
grunde fir » grunde fur, grunde der, grunde die
und libro » un libro, und librosa, und lido
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) OR (und libro)) e literatur greca ) OR ( i grunde fir la literatura sarda )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i ((grund libro) OR (und libro)) e literatur greca ) or ( i grunde fir la literatura sarda ))".
• Adding a wildcard symbol may retrieve word variants: (( i ((grund libro) OR (und libro)) e literatur greca ) or ( i grunde fir la literatura sarda ))*.