That's not a palm tree, it is some type of Dracaena.
I found that Dragons Heart did not like pots. I almost tossed it but chance would have it my Matador plant in the ground for two years never bloomed and was wasting space so I dug it and planted this one since the flowers were close. Once in the ground it took off. It really is a pretty flower.
I have been coming to the forums for a while and never noticed you were from Na Trang. I was just there in November.
Thanks for that, I have been treating it like a Palm, now I will research to see if that's ok. It seems that Dragons Heart really does appreciate space, mine is now thriving. Hoped you liked Nha Trang on your visit, not sure if you would now its the rainy season and am so glad my garden is on the roof.