Perhaps you should try some spelling variations:
letteratura sarda » letteratura storia, letteratura sulla, letteratura arte
della letteratura » nella letteratura
della literatura » pela literatura, nella letteratura, la literatura
e letteratura » y literatura, e literatur
ground libro » ground air, ground links, ground link
_ grounde » _ grounded, _ ground, _ grounds
i ground » i group, i groups, i grunde
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 ground libro e letteratura sarda ) OR ( _ grounde libri ((della literatura) OR (della letteratura)) historia )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i ground libro e letteratura sarda ) or ( _ grounde libri ((della literatura) OR (della letteratura)) historia ))".
• Adding a wildcard symbol may retrieve word variants: (( i ground libro e letteratura sarda ) or ( _ grounde libri ((della literatura) OR (della letteratura)) historia ))*.