Show [related] offers/coupons on store page

I want to display similar offers/coupons on store page same as link given below:
http://www.coupondunia.in/freecharge

I have done some customization and able to show related offers on listing by categories but don’t know how to display them on store page..

Examples:
Listing page: https://33coupons.in/coupon/get-flat-10-max-rs-150-cashback-on-bus-booking/ (Successfully implemented)
Store page: https://33coupons.in/abhibus-coupons/ (Not able to display on such kind of stores pages)

Somebody please help, this is required if a store have very less number of offers or no offers.

-Ankit