How do you say “black tea” in Vietnamese?

Vietnamese words for “black tea”

• trà đenListennoun
  Hanoi [t͡ɕaː˨˩ ʔɗɛn˧˧] · Saigon [ʈaː˨˩ ʔɗɛŋ˧˧]trà falling đen level

  black tea

  for “black tea” meaning: Tea leaves which have been "fermented" (actually, oxidized) before drying to enhance their flavour (cf. green tea).

• hồng tràListennoun
  Hanoi [həwŋ͡m˨˩ t͡ɕaː˨˩] · Saigon [həwŋ͡m˨˩ ʈaː˨˩]hồng falling trà falling

  black tea

  for “black tea” meaning: Tea leaves which have been "fermented" (actually, oxidized) before drying to enhance their flavour (cf. green tea).