Perhaps you should try some spelling variations:
"literature arab e isla." » "literatura arabe e isla.", "literature early e isla.", "literatura para e isla.", "literature arabe e isla.", "literature arab _ isla.", "literature arabes e isla.", "literature arab de isla.", "literature arab e islam.", "literature arab e isela."
"literatura e y isla." » "literatura de y isla.", "literatura en y isla.", "literatura del y isla.", "literatura fe y isla.", "literatura es y isla."
"literatura mexicana e islas." » "literatura mexicana de islas.", "literatura mexicana en islas.", "literatura mexicana el islas.", "literatura mexicana el islam.", "literatura mexicana e islams.", "literatura mexicana e iselas."

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("literature arab e isla.") or ("literatura e y isla."))) or ("literatura mexicana e islas."))~.
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• Adding a wildcard symbol may retrieve word variants: (((("literature arab e isla.") or ("literatura e y isla."))) or ("literatura mexicana e islas."))*.