with Viet Nam?country=Viet Nam?country=Viet Nam?country=Viet Nam?country=Viet Nam?country=Viet Nam?country=Viet Nam?country=Viet Nam inventory typically offer pricing models of flat_rate, CPA, % of Media Spend, CPC on channels such as Search, Social, Mobile Display, Mobile Video. A majority of their inventory are in countries such as Canada, United States, Portugal, India, Mexico