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