What is the easiest way to travel from Hanoi to Nanning, with stopping to see the Deitian Falls?

From Hanoi Friendship Hotel, there are direct buses for NN.
There is no direct buses for Detian Fall and you need to transfer several times before reaching Detian, so it is suggested to reach NN first and from the same bus station (Langdong Bus Station), there is one direct bus at 08:30 to Detian Fall directly.