Perhaps you should try some spelling variations:
"literatura arabe del islam." » "literatura breve del islam.", "literatura e del islam.", "literatura al del islam.", "literatura arabes del islam.", "literatura arabe de islam.", "literatura arabe el islam."
"literatura del de isaac." » "literatura en de isaac.", "literatura del dean isaac."
"literatura de de isla." » "literatura de fe isla.", "literatura de di isla."

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