Perhaps you should try some spelling variations:
"europe concepts history ser." » "europe concept history ser.", "europe contents history ser.", "europe concepts historical ser.", "europe concepts history sir.", "europe concepts history sea.", "europe concepts history sec.", "european concepts history ser."
"one conceptual history set." » "some conceptual history set.", "8 conceptual history set.", "one conceptual history self.", "one conceptual history so.", "one conceptual history sir."

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (("europe concepts history ser.") OR ("one conceptual history set.")).
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