How do you say “pseudonym” in Vietnamese?

Vietnamese words for “pseudonym”

• biệt hiệuListennoun
  Hanoi [ʔɓiət̚˧˨ʔ hiəw˧˨ʔ] · Saigon [ʔɓiək̚˨˩˨ hiw˨˩˨]biệt heavy hiệu heavy

  nickname; alias

  for “pseudonym” meaning: A fictitious name (more literally, a false name), as those used by writers and movie stars.

• bút danhListennoun
  Hanoi [ʔɓut̚˧˦ zajŋ̟˧˧] · Saigon [ʔɓʊk͡p̚˦˥ jan˧˧]bút rising danh level

  a pen name

  for “pseudonym” meaning: A fictitious name (more literally, a false name), as those used by writers and movie stars.