My trip was done at the time when online booking in Vietnam and Cambodia was not so readily available. Now, you can book your tickets

Singapore, Malaysia & ASEAN Railway Travel Blog | RailTravel Station features pictures and information of railways and other means of travel with a special focus on Singapore, Malaysia and ASEAN. | Due to the fluidity of the COVID-19 pandemic situation, the travel information that you are reading may not be accurate at this point of time. Always double-check with the operator for the latest updates.
My trip was done at the time when online booking in Vietnam and Cambodia was not so readily available. Now, you can book your tickets