Perhaps you should try some spelling variations:
"literatura del e isaac." » "literatura de e isaac.", "literatura del de isaac.", "literatura del en isaac.", "literatura del _ isaac.", "literatura del v isaac.", "literatura del c isaac."
"literatura en ddde isaacm." » "literatura de ddde isaacm.", "literatura espana ddde isaacm.", "literatura den ddde isaacm.", "literatura en donde isaacm.", "literatura en dddde isaacm.", "literatura en ddden isaacm.", "literatura en ddd_ isaacm."
"literatura e de isla." » "literatura de de isla.", "literatura e de isaac.", "literatura y de isla.", "literatura _ de isla."

Try widening your search to All Fields.

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

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