We travelled from HCMC to Mui Ne and back during Tet a couple of years ago and didn't have any problems booking the bus, but I would guess the 8th and 9th are going to be two of the busiest travel days (as the 9th is new year's eve and the first official day of Tet) so I'd suggest trying to book the return bus at the same time as you book your outward journey. I don't know if that's possible but I guess it should be.
HCM - Muine 200km - 5hours. Many bus go to Mui Ne from HCM (like Phuongtrang, Mailinh, Kumho, Sinhcafe, Hanhcafe... On Pham Ngu Lao street have many travel agent travel, you can book ticket.
You should book ticket as soon as possible
#3 maryjame has been a member since 14/1/2013. Posts: 9