Perhaps you should try some spelling variations:
"literatura breve de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isla.", "literatura breve de isaac."
"literatura arabe 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 arabde e islam.", "literatura arabel e islam."
"literatura e e islam." » "literatura de e islam.", "literatura en e islam.", "literatura del e islam.", "literatura e el islam.", "literatura e e islas.", "literatura e del islam.", "literatura e de islam.", "literatura el e islam."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura breve de isla.") or ((("literatura arabe e islam.") OR ("literatura e e islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura breve de isla.") OR ((("literatura arabe e islam.") OR ("literatura e e islam.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura breve de isla.\") or (((\"literatura arabe e islam.\") OR (\"literatura e e islam.\"))))".
• Removing quotes may allow a broader search: (( literatura breve de isla. ) or ((( literatura arabe e islam. ) OR ( literatura e e islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura breve de isla.") or ((("literatura arabe e islam.") OR ("literatura e e islam."))))*.