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 CPM, flat_rate, Pay-Per-Call on channels such as Social, Desktop Display, Mobile Display, Email. A majority of their inventory are in countries such as India, United States, Canada, Greece, Italy