Perhaps you should try some spelling variations:
letteratura italian » letteratura italiana, literature italian, litteratur italien
letteratura storia » letterature storie, letteratura sarda, literatura historia
del letteratura » della letteratura, di letteratura, de litteratura
e letteratura » y literatura, e literatur
ground libro » ground air, ground links, ground link
libri della » libro della, libri dalla, libri nella
i grounde » i grunde, i grounds, _ grounde
i ground » i group, i groups, i grunde

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 ((del letteratura) OR (e letteratura)) sarda ) OR ( i grounde libri della ((letteratura storia) OR (letteratura italian)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( i ground libro ((del letteratura) OR (e letteratura)) sarda ) or ( i grounde libri della ((letteratura storia) or (letteratura italian)) ))".
• Adding a wildcard symbol may retrieve word variants: (( i ground libro ((del letteratura) OR (e letteratura)) sarda ) or ( i grounde libri della ((letteratura storia) or (letteratura italian)) ))*.