Perhaps you should try some spelling variations:
"literatura arabes e isla." » "literatura arabe e isla.", "literature arab e isla.", "literatura area e isla.", "literatura arabes e islas.", "literatura arabes e islam.", "literatura arabes e isela."
"literatura breve de isla." » "literatura de de isla.", "literatura en de isla.", "literatura del de isla.", "literatura breve de isaac.", "literatura breve de islas.", "literatura breve de islam.", "literatura breve de isela."
"literatura arte e isla." » "literatura arabe e isla.", "literatura entre e isla.", "literatura aurea e isla.", "literatura arte e islas.", "literatura arte e islam.", "literatura arte e isela.", "literatura arte de isla.", "literatura arte en isla.", "literatura arte _ isla."

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