Perhaps you should try some spelling variations:
"literature arab de isla." » "literatura arabe de isla.", "literature early de isla.", "literatura para de isla.", "literature arabe de isla.", "literature aras de isla.", "literature arabes de isla.", "literature arab de isaac."
"literatura arte de isla." » "literatura arabe de isla.", "literatura breve de isla.", "literatura entre de isla.", "literatura arte de isaac.", "literatura artde de isla.", "literatura arty de isla.", "literatura art_ de isla."
"literatura e de isaacs." » "literatura de de isaacs.", "literatura en de isaacs.", "literatura del de isaacs.", "literatura e de isaac.", "literatura e de isaias.", "literatura e de islas.", "literatura y de isaacs.", "literatura _ de isaacs."

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura e de isaacs.") or ((("literature arab de isla.") or ("literatura arte de isla."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura e de isaacs.") OR ((("literature arab de isla.") OR ("literatura arte de isla.")))).
• Removing quotes may allow a broader search: (( literatura e de isaacs. ) or ((( literature arab de isla. ) or ( literatura arte de isla. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura e de isaacs.") or ((("literature arab de isla.") or ("literatura arte de isla."))))*.