Perhaps you should try some spelling variations:
"literatura arabes e islam." » "literatura arabe e islam.", "literatura arte e islam.", "literature arab e islam.", "literatura arabes el islam.", "literatura arabes e islas.", "literatura arabes 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 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 e de islam.") or ((("literatura del x islam.") or ("literatura arabes e islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura e de islam.") OR ((("literatura del x islam.") OR ("literatura arabes e islam.")))).
• Removing quotes may allow a broader search: (( literatura e de islam. ) or ((( literatura del x islam. ) or ( literatura arabes e islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura e de islam.") or ((("literatura del x islam.") or ("literatura arabes e islam."))))*.