How do you say “by the way” in Vietnamese?

Vietnamese words for “by the way”

• tiện thểListenadverb
  Hanoi [tiən˧˨ʔ tʰe˧˩] · Saigon [tiəŋ˨˩˨ tʰej˨˩˦]tiện heavy thể dipping

  while ... at it

  for “by the way” meaning: Incidentally; used in referencing a parenthetical statement not timely, central, or crucial to the topic at hand; foregone, passed by, something that has already happened.

  • Tiện thể cho tôi hỏi, bạn có nghĩ chết là hết không?By the way, do you think that when you die that's it?
• nhân tiệnListenadverb
  Hanoi [ɲən˧˧ tiən˧˨ʔ] · Saigon [ɲəŋ˧˧ tiəŋ˨˩˨]nhân level tiện heavy

  incidentally; conveniently; by the way

  • Nhân tiện, mày có nghĩ chết là hết không?By the way, do you think that when you die that's it?