Perhaps you should try some spelling variations:
"literatura del dean isla." » "literatura en dean isla.", "literatura del de isla.", "literatura del dean la.", "literatura del en isla.", "literatura del dano isla.", "literatura del dia isla."
"literatura de de isaacm." » "literatura de de isaac.", "literatura de e isaac.", "literatura de fe isaacm.", "literatura de di isaacm."
"literatura y de islam." » "literatura y del islam.", "literatura y de isla.", "literatura y e islam."

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 y de islam.") or ((("literatura de de isaacm.") or ("literatura del dean isla."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura y de islam.") OR ((("literatura de de isaacm.") OR ("literatura del dean isla.")))).
• Removing quotes may allow a broader search: (( literatura y de islam. ) or ((( literatura de de isaacm. ) or ( literatura del dean isla. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura y de islam.") or ((("literatura de de isaacm.") or ("literatura del dean isla."))))*.