The Museum of Ethonology in Hanoi is a great place to have a glance at the traditional culture of Vietnam’s 54 ethnic groups. The museum is located the Cầu Giấy District, about 8km from city centre… took a bit of travelling time but worth a visit.
Sharing some photos below, taken inside the museum building…

Chinese stuff in Vietnamese culture

Some really old documents
Traditional costumes of various ethnicity
Some wooden carvings
Misc ritual ‘trees’ used during traditional festivals