How do you say “maintenance” in Vietnamese?

Vietnamese words for “maintenance”

• bảo dưỡngListenverb
  Hanoi [ʔɓaːw˧˩ zɨəŋ˦ˀ˥] · Saigon [ʔɓaːw˨˩˦ jɨəŋ˨˩˦]bảo dipping dưỡng creaky rising

  to maintain; to keep in good repair

  for “maintenance” meaning: Actions performed to keep some machine or system functioning or in service.

• bảo trìListenverb
  Hanoi [ʔɓaːw˧˩ t͡ɕi˨˩] · Saigon [ʔɓaːw˨˩˦ ʈɪj˨˩]bảo dipping trì falling

  to maintain; to preserve

  for “maintenance” meaning: Actions performed to keep some machine or system functioning or in service.