On the Admin menu, select System > Configuration. Then in the panel on the left under Customers, select Promotions. But I can't see any Auto Generated Specific Coupon Codes section there as described in http://docs.magento.com/m1/ce/user_guide/marketing/price-rules-shopping-cart-coupon-code-autogenerate.html
What might be the cause for this?
( Although I went through Magento documents, it is for EE 1.14 and above versions. )