I don't like talking about Vietnam because some comrades get angry with my opinion but hey why not.
Vietnam got recaptured by Neo-colonialism. In Wretched of the earth Fanon warns against the national bourgeoisie capture of the post-colonial state and selling it out to former colonial powers. I see a variation on that going on in Vietnam. Foreign capital and the local bourgeoisie control the means of production. Some of that foreign investment comes from zionists so they support the zionist project.
The party does try to raise the living standards for workers through social spending like healthcare and pensions but they have essentially bought off the revolutionaries and are now slowly betraying them now that the revolutionaries are too old to take up arms.
China avoided this fate by having a civil war after (also preceding and concurrent with) the anti-colonial war which separated the national bourgeoisie from the real communist revolutionaries and followed that with the Cultural Revolution.