Perhaps you should try some spelling variations:
"literatura sabe de isla." » "literatura isabel de isla.", "literatura arabe de isla.", "literatura sobre de isla.", "literatura sabe de isaac."
"literatura de de isaacm." » "literatura de de isaac.", "literatura de e isaac.", "literatura de fe isaacm.", "literatura de di isaacm."
"literatura de de islam." » "literatura de del islam.", "literatura de e islam.", "literatura de de ilam.", "literatura de de isaacm.", "literatura de fe islam.", "literatura de di 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 sabe de isla.") or ((("literatura de de islam.") OR ("literatura de de isaacm."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura sabe de isla.") OR ((("literatura de de islam.") OR ("literatura de de isaacm.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"literatura sabe de isla.\") or (((\"literatura de de islam.\") OR (\"literatura de de isaacm.\"))))".
• Removing quotes may allow a broader search: (( literatura sabe de isla. ) or ((( literatura de de islam. ) OR ( literatura de de isaacm. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura sabe de isla.") or ((("literatura de de islam.") OR ("literatura de de isaacm."))))*.