Perhaps you should try some spelling variations:
"literature spain e islas." » "literatura espana e islas.", "literature spain de islas.", "literature spain _ islas.", "literature spain a islas.", "literature spain el islam."
"literatura vale una idea." » "literatura al una idea.", "literatura ele una idea.", "literatura galega una idea.", "literatura hace una idea.", "literatura vale la idea."
"literatura de de isaac." » "literatura de fe isaac.", "literatura de di isaac."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura de de isaac.") or ((("literature spain e islas.") or ("literatura vale una idea."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura de de isaac.") OR ((("literature spain e islas.") OR ("literatura vale una idea.")))).
• Removing quotes may allow a broader search: (( literatura de de isaac. ) or ((( literature spain e islas. ) or ( literatura vale una idea. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura de de isaac.") or ((("literature spain e islas.") or ("literatura vale una idea."))))*.