Like buying oils from Arab, if Nuclear Fusion Energy commercialized in the future, Vietnam can buy the nuclear fusion power plant from U.S, Russia and China. I think like today operating a nuclear power plant, above 3x countries also provide limited Helium-3 materials for ur nuclear fusion power plant.
I ever read currently only U.S, Russia and China developing their own Nuclear Fusion device (Europe ???), coz this new energy technology base on nuclear fusion(principle of the hydrogen bomb).
Dig Helium-3 on the moon just like dig oils in ur garden, of course the moon belongs to all human but the Helium-3 belong to who can take it and sell on the earth.
SPACE & NUCLEAR technology is the FUTURE