Perhaps you should try some spelling variations:
"literatura en de isla." » "literatura espana de isla.", "literatura deln de isla.", "literatura en de isaac."
"literatura e de isaias." » "literatura del de isaias.", "literatura e de indias.", "literatura e de isaac.", "literatura de de isaias.", "literatura y de isaias.", "literatura _ de isaias."
"literatura de del islam." » "literatura de el islam.", "literatura dde del islam.", "literatura dy del islam.", "literatura d_ del islam."

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 del islam.") or ("literatura e de isaias."))) or ("literatura en de isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura de del islam.") OR ("literatura e de isaias."))) OR ("literatura en de isla.")).
• Removing quotes may allow a broader search: (((( literatura de del islam. ) or ( literatura e de isaias. ))) or ( literatura en de isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura de del islam.") or ("literatura e de isaias."))) or ("literatura en de isla."))*.