Perhaps you should try some spelling variations:
"literature arab _ isla." » "literatura arabe _ isla.", "literature early _ isla.", "literatura para _ isla."
"literatura de de isaacm." » "literatura de de isaac.", "literatura de de islam.", "literatura de e isaac.", "literatura de fe isaacm.", "literatura de di isaacm."
"literatura _ de isla." » "literatura _ de isaac."

You may be able to get more results by adjusting your search query.

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