I am suprised that no one else has chimed in...
a plant photo would be helpful in ID confirmation. Ho Chi Minh tends to have wavier leaves (but not always). Delenatii tends to have yellower staminodes. Your flower has a greener one.
There is a slight chance that it is a Paph. (Ho Chi Minh x delenatii)...a cross that has been done and Parkside orchids is selling it:
http://www.parksideorchids.com/image...enatii%20S.jpg Note it also has a green staminode. The green staminode comes from the vietnamense in its background.
Anyway, this is a gorgeous plant and a keeper, much better than the average. take good care of it.
....I am not an expert at identification, this is about all I can tell you. My guts tell me that it is not straight delenatii