I think the problem with name is because most non vietnamese-speakers do not realize that vietnamese's names are written with last name (or Clan name) first and first name (individual name) last.The correct name is
Dendrobium trantuanii Perner & X.N.Dang, Orchidee (Hamburg) 54: 220 (2003)
A really very nice species with beautiful flowers.
Best greetings
Olaf