Perhaps you should try some spelling variations:
"literature arab de isaac." » "literatura arabe de isaac.", "literature early de isaac.", "literatura para de isaac.", "literature arabe de isaac.", "literature aras de isaac.", "literature arabes de isaac."
"literatura del de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del dean isla."
"literatura es e isolda." » "literatura en e isolda.", "literatura e e isolda.", "literatura el e isolda.", "literatura es de isolda.", "literatura es e isela.", "literatura es e isla.", "literatura es el isolda.", "literatura es en isolda."

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