How do you say “like water off a duck's back” in Vietnamese?

Vietnamese words for “like water off a duck's back”

• như nước đổ lá khoaiListenphrase
  Hanoi [ɲɨ˧˧ nɨək̚˧˦ ʔɗo˧˩ laː˧˦ xwaːj˧˧] · Saigon [ɲɨ˧˧ nɨək̚˦˥ ʔɗow˨˩˦ laː˦˥ kʰwaːj˧˧]như level nước rising đổ dipping lá rising khoai level

  for “like water off a duck's back” meaning: Without immediate or lasting effects.

• như nước đổ đầu vịtListenphrase
  Hanoi [ɲɨ˧˧ nɨək̚˧˦ ʔɗo˧˩ ʔɗəw˨˩ vit̚˧˨ʔ] · Saigon [ɲɨ˧˧ nɨək̚˦˥ ʔɗow˨˩˦ ʔɗəw˨˩ vɨt̚˨˩˨]như level nước rising đổ dipping đầu falling vịt heavy

  for “like water off a duck's back” meaning: Without immediate or lasting effects.