At Bach Dang Wharf at HCMC, samsters can consider to take a 9-seater mini-bus to Vung Tau. The journey takes 2 hrs and cost 160,000 VND for each passenger.
The website is:
www.cmdtour.com
Contact no. is: 01.246.200.200
My friend commented that by taking the mini-bus instead of hydrofoil, we were able to see the countryside of Vietnam, instead of just a river. The mini-bus is definitely more comfortable than taking a taxi. Just make sure to call earlier in order to make a booking.