Perhaps you should try some spelling variations:
"i grunde livre e letteratura sarda" » "i grunde livre e letteratura storia", "i grunde livre e letteratura sulla", "i grunde livre e letteratura arte", "i grunde livre y literatura sarda", "i grunde livre e literatur sarda", "i grande livre e letteratura sarda", "i grand livre e letteratura sarda", "i grunde liegen e letteratura sarda", "i grunde livre de letteratura sarda", "i grunde livre en letteratura sarda", "i grunde livre et letteratura sarda"
"i gram libro de litterature de" » "i gram libro de litterature et", "i gram libro de litterature russe", "i gram libro la litterature de", "i gram libro et litterature de", "i gran libro de litterature de", "bi gram libro de litterature de"
"i gram libro de literatura de" » "i gram libro la literatura de", "i gram libro y literatura de", "i gram libro a literatura de", "i gram libro de literatura y", "i gram libro de literatura en", "i gran libro de literatura de", "bi gram libro de literatura de"

Try widening your search to All Fields.

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 gram libro de literatura de") OR ("i gram libro de litterature de"))) OR ("i grunde livre e letteratura sarda")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"i gram libro de literatura de\") OR (\"i gram libro de litterature de\"))) or (\"i grunde livre e letteratura sarda\"))".
• Removing quotes may allow a broader search: (((( i gram libro de literatura de ) OR ( i gram libro de litterature de ))) or ( i grunde livre e letteratura sarda )).
• Adding a wildcard symbol may retrieve word variants: (((("i gram libro de literatura de") OR ("i gram libro de litterature de"))) or ("i grunde livre e letteratura sarda"))*.