Congratulations! You’ve rereleased a much more limited and awkward version of Roblox in Vietnam under VNG and geoblocked them from the official website. (Negative)
If you want Roblox to be more fully established and localized in Vietnam, then the next logical step would be to create a section for Vietnamese developers to communicate in order to attract the locals more for the ease of communicating problems and solutions in Vietnamese and create games for the community.