Perhaps you should try some spelling variations:
"literature arabes de isaac." » "literatura arabe de isaac.", "literature arab de isaac.", "literature francesc de isaac.", "literature arabes e isaac.", "literature arabe de isaac.", "literature arabes y isaac."
"literatura e de ilam." » "literatura en de ilam.", "literatura del de ilam.", "literatura e de islam.", "literatura e de chilam.", "literatura y de ilam.", "literatura _ de ilam.", "literatura o de ilam."
"literatura de de isaacm." » "literatura de de islam.", "literatura de e isaac.", "literatura de fe isaacm.", "literatura de di isaacm.", "literatura dy de isaacm.", "literatura d_ de isaacm.", "literatura do de isaacm."

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