Perhaps you should try some spelling variations:
"literatura arabe e islam." » "literatura breve e islam.", "literatura de e islam.", "literatura al e islam.", "literatura arabes e islam.", "literatura arabe de islam.", "literatura arabe en islam.", "literatura arabe el islam.", "literatura arabe e islas.", "literatura arabe del islam."
"literatura del c isolda." » "literatura de c isolda.", "literatura en c isolda.", "literatura del e isolda.", "literatura del de isolda.", "literatura del v isolda.", "literatura del _ isolda."
"literatura e de islam." » "literatura de de islam.", "literatura en de islam.", "literatura e del islam.", "literatura e de isla.", "literatura e de ilam.", "literatura e de islas.", "literatura e ddel islam.", "literatura y de islam.", "literatura _ de islam."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura arabe e islam.") or ((("literatura del c isolda.") or ("literatura e de islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura arabe e islam.") OR ((("literatura del c isolda.") OR ("literatura e de islam.")))).
• Removing quotes may allow a broader search: (( literatura arabe e islam. ) or ((( literatura del c isolda. ) or ( literatura e de islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura arabe e islam.") or ((("literatura del c isolda.") or ("literatura e de islam."))))*.