Offer or Coupon Cannot be Combined with any Other Offers:
This means that you cannot combine the coupon with any other discounts, such as a military discount, senior citizen discount, student discount.  Also this typically means that you cannot combine a like offer on the same product. For example, if you are using a store coupon that says “Coupon Cannot be Combined with any Other Offers” this means that you can not stack it with another store coupon.