Perhaps you should try some spelling variations:
"literatura arabes y isla." » "literatura arte y isla.", "literature arab y isla.", "literatura area y isla.", "literatura breves y isla.", "literatura des y isla.", "literatura es y isla.", "literatura arabes e isla.", "literatura arabe y isla."
"literatura arabe e isaac." » "literatura breve e isaac.", "literatura de e isaac.", "literatura e e isaac.", "literatura arabes e isaac.", "literatura arabe de isaac.", "literatura arabe en isaac.", "literatura arabe _ isaac."
"literatura es y isla." » "literatura en y isla.", "literatura e y isla.", "literatura el y isla.", "literatura es e isla."

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