Perhaps you should try some spelling variations:
"frontiers in european entrepreneurship series" » "frontiers in women entrepreneurship series", "frontiers in european entrepreneurship services", "frontiers in european entrepreneurship theories", "frontiers in european entrepreneurship studies"
"Frontiers in European entrepreneurship serves" » "Frontiers in European entrepreneurship services", "Frontiers in European entrepreneurship smes", "Frontiers in European entrepreneurship sears", "Frontiers in European entrepreneurship servicess", "Frontiers in European entrepreneurship serenas", "Frontiers in European entrepreneurship stevens"
"Frontiers in European entrepreneurship serve" » "Frontiers in European entrepreneurship services", "Frontiers in European entrepreneurship serena", "Frontiers in European entrepreneurship steven"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("frontiers in european entrepreneurship series") OR ((("Frontiers in European entrepreneurship serve") OR ("Frontiers in European entrepreneurship serves")))).
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• Removing quotes may allow a broader search: (( frontiers in european entrepreneurship series ) or ((( Frontiers in European entrepreneurship serve ) OR ( Frontiers in European entrepreneurship serves )))).
• Adding a wildcard symbol may retrieve word variants: (("frontiers in european entrepreneurship series") or ((("Frontiers in European entrepreneurship serve") OR ("Frontiers in European entrepreneurship serves"))))*.