Perhaps you should try some spelling variations:
"literatura del dan isac." » "literatura de dan isac.", "literatura en dan isac.", "literatura del dano isac.", "literatura del dean isac.", "literatura del dane isac.", "literatura del dan isaac.", "literatura del dan fisac.", "literatura del dan isa."
"literatura a dde isaacm." » "literatura al dde isaacm.", "literatura de dde isaacm.", "literatura en dde isaacm.", "literatura a de isaac.", "literatura a de isaacm."
"literatura e de isla." » "literatura de de isla.", "literatura en 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 a dde isaacm.") or ("literatura del dan isac."))) or ("literatura e de isla."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura a dde isaacm.") OR ("literatura del dan isac."))) OR ("literatura e de isla.")).
• Removing quotes may allow a broader search: (((( literatura a dde isaacm. ) or ( literatura del dan isac. ))) or ( literatura e de isla. )).
• Adding a wildcard symbol may retrieve word variants: (((("literatura a dde isaacm.") or ("literatura del dan isac."))) or ("literatura e de isla."))*.