Huobi OTC is expanding into Vietnam, users who do purchases now with VND will be able to do so with zero platform fees and they can even transact for free to one of Huobi's exchanges. Huobi OTC supports several Altcoins and Bitcoin and also offers a trusted escrow service. Check below for details:

https://walletinvestor.com/magazine/huobi-otc-is-expanding-towards-the-vietnam-market/