This is the most popular beach resort in the north of Vietnam and can get very buisy at weekend since it is popular with visitors from Hanoi. There are two beaches separated by a headland. (most of the hotels are on the north end).
You can reach Sam Son from Hanoi which is about 170km to the north, ask at your hotel of a travel agent.
Below is a list of hotels in Sam Son Beach sorted by price range (highest first). If you wish to telephone a hotel the area code for Sam Son Beach is 037 (+8437 from outside Vietnam).