Perhaps you should try some spelling variations:
"france / economic condtiions / 18th century" » "france / economic conditions / 18th century", "france / economics conditions / 18th century", "france / economic condition / 18th century"
"france / economic condtions / 18th century" » "france / economic conditions / 18th century", "france / economics conditions / 18th century", "france / economic condition / 18th century"

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