Perhaps you should try some spelling variations:
"literatura el _ islam." » "literatura del _ islam.", "literatura en _ islam.", "literatura e _ islam."
"literatura de fer islam." » "literatura de el islam.", "literatura de del islam.", "literatura de e islam.", "literatura de fez islam.", "literatura de feo islam.", "literatura de feu islam."
"literatura de de isla." » "literatura de de isaac.", "literatura de fe isla.", "literatura de di 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 el _ islam.") or ((("literatura de de isla.") or ("literatura de fer islam."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura el _ islam.") OR ((("literatura de de isla.") OR ("literatura de fer islam.")))).
• Removing quotes may allow a broader search: (( literatura el _ islam. ) or ((( literatura de de isla. ) or ( literatura de fer islam. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura el _ islam.") or ((("literatura de de isla.") or ("literatura de fer islam."))))*.