Many people choose not to go to those churches; therefore, there's a movement of house churches in Vietnam, and they have been severely, brutally suppressed. For instance, between 2001 and 2004 alone over 4,000 house churches of the Protestant Montagnard mountain people, an ethnic minority indigenous people, were burned, destroyed, or closed down, and very few have opened up now, only those that are allowed by government and actually run by the government. A number of Montagnard have tried to continue to stick together and conduct house churches, but with the new law that wouldn't even be allowed because they must register and be pre-approved by the government.
On June 4th, 2015. See this statement in context.