Perhaps you should try some spelling variations:
"literature early new islam." » "literature study new islam.", "literature latin new islam.", "literatura al new islam.", "literature early el islam.", "literature early del islam.", "literature early e islam."
"literatura en de isaac." » "literatura de de isaac.", "literatura espana de isaac.", "literatura den de isaac.", "literatura deln de isaac."
"literatura e una idea." » "literatura de una idea.", "literatura del una idea.", "literatura e la idea.", "literatura le una idea.", "literatura ue una idea."

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (("literatura en de isaac.") or ((("literature early new islam.") or ("literatura e una idea."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("literatura en de isaac.") OR ((("literature early new islam.") OR ("literatura e una idea.")))).
• Removing quotes may allow a broader search: (( literatura en de isaac. ) or ((( literature early new islam. ) or ( literatura e una idea. )))).
• Adding a wildcard symbol may retrieve word variants: (("literatura en de isaac.") or ((("literature early new islam.") or ("literatura e una idea."))))*.