no one is threatening to invade/nuke mainland vietnam(internet fanboys aside). even if vietnam had nukes, no one in their right mind would use it over a maritime dispute(not to mention the international backlash), and frankly, despite the disputes, the communist party relations are fairly good. North korea has nukes because they fear the US/SK might come to actually end their country, whether that fear is baseless or not is debatable though. thats said, clearly more subs/ships/planes would do more good for the maritime dispute than nukes ever could. which isnt a problem bcause we do agree that they aren't planning/trying to militarize the tech, so everyone's happy then.