Perhaps you should try some spelling variations:
litteratura sarda » letteratura sarda, letteratura storia, letteratura sulla
letteratura arte » letteratura arti, letteratura sarda, letteratura e
de litteratura » de litterature, de literatura, da literatura
grunde general » grande general, guide general, grade general
e letteratura » y literatura, e literatur
grain libro » grain fibril
general e » general et, general en

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 ((grain libro) OR (gran libro)) de litteratura sarda ) OR ( i grunde general e letteratura arte )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i ((grain libro) OR (gran libro)) de litteratura sarda ) or ( i grunde general e letteratura arte ))".
• Adding a wildcard symbol may retrieve word variants: (( i ((grain libro) OR (gran libro)) de litteratura sarda ) or ( i grunde general e letteratura arte ))*.