Perhaps you should try some spelling variations:
"literatur_ de de isla." » "literatura de de isla.", "literature de de isla.", "literatura del de isla.", "literatur_ de de isaac.", "literatur_ de fe isla.", "literatur_ de di isla."
"literatura y de isaacm." » "literatura y de isaac.", "literatura y e isaac."
"literatura _ de islam." » "literatura _ del islam.", "literatura _ e islam.", "literatura _ de ilam.", "literatura _ de isaacm."

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 islam.") or ("literatur_ de de isla."))) or ("literatura y de isaacm."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura _ de islam.") OR ("literatur_ de de isla."))) OR ("literatura y de isaacm."))*.
• Removing quotes may allow a broader search: (((( literatura _ de islam. ) or ( literatur_ de de isla. ))) or ( literatura y de isaacm. ))*.