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

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