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 x islam." » "literatura de x islam.", "literatura en x islam.", "literatura del _ islam.", "literatura del el islam.", "literatura del al islam.", "literatura del xx islam.", "literatura del xv islam.", "literatura del xi islam."
"literatura e de islas." » "literatura de de islas.", "literatura en de islas.", "literatura e e islas.", "literatura e de isla.", "literatura e de islam.", "literatura y de islas.", "literatura _ de islas."

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