LAWA CEO has confirmed talks with all three of Vietnam's longhaul airlines for a nonstop to LAX, and at least two of them have confirmed their intent to eventually serve.
The interesting thing, is the most advanced talks area actually with VietJet, but since their longest-ranged current aircraft is the A333 (which packs in 377 seats at 9-abreast!) and no other widebodies on order, they won't be doing a nonstop any time soon. Heck, IMHO, even a 1stop would struggle.
The other is Bamboo, who at least has 789s on order, but limited experience with them.
https://viewfromthewing.com/lax-ceo-say ... o-vietnam/