Before you can talk much about other countries people you need to know about them, about their culture (at diff region within the country, specially Vietnamese), In general here is where the goverment and the people where i live works:
1) Money will buy you mostly everything, including a goverment seat
2) There are park ranger at national park, where you are not allow to collect orchid ... but here is how it works: the local can share some percentages of what he/she make by selling orchid, animal, tree, etc ... these rangers will share some percentage to his boss, then his boss will share some percentage to his boss and so on ... one thing you got to remmenber that is: the boss buy his seat, so he can't get fired, if there is heating from upper boss, he will move to diff location and do the same thing over and over again ....
Here is another example: If the police stop you for not obey the traffic law (speed, over weight, etc ...) You just have to pay him (50% or something like that) in cash then you go
Now: how do you deal with corruption goverment? You don't, you just deal with it
3) Vietnam can accesses Thai Lan, Cambodian and China border. You can move a 18 wheelers in and out at custom border just like free way. You just know who you need to talk to before you move 18 wheelers of orchid .... For smaller scale, you don't need to go by custom check point, you can just cross the trail to another country
4) the bottom line: you can't stop people from collecting wild orchid, as long as they can make profit from it. (if someone have a solution, I'm listening ... don't tell me, everyone in this world will stop buying orchid
)
5) I read somewhere and people mention that: propagate in third world country where the orchids live, ... my comment to this is good luck ... to buy orchid median and sowing kit ... it is way more expensive than buy wild plant and you don't have to wait many years for it to flower
You can talk about it as much as you want, ... It is what it is, nothing you can do about stopping people from collecting wild orchid as long as they can sell it and feed their family
Thank you for reading
BD