Perhaps you should try some spelling variations:
"literatura la de isaac." » "literatura de de isaac.", "literatura en de isaac.", "literatura e de isaac.", "literatura la fe isaac."
"literatura ha de islam." » "literatura a de islam.", "literatura de de islam.", "literatura en de islam.", "literatura ha de isla.", "literatura ha e islam.", "literatura ha de ilam."
"literatura y del islam." » "literatura y el islam."

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