How do you say “fish in troubled waters” in Vietnamese?

Vietnamese words for “fish in troubled waters”

• thừa nước đục thả câuListenverb
  Hanoi [tʰɨə˨˩ nɨək̚˧˦ ʔɗʊwk͡p̚˧˨ʔ tʰaː˧˩ kəw˧˧] · Saigon [tʰɨə˨˩ nɨək̚˦˥ ʔɗʊwk͡p̚˨˩˨ tʰaː˨˩˦ kəw˧˧]thừa falling nước rising đục heavy thả dipping câu level

  to fish in troubled waters

  for “fish in troubled waters” meaning: To try to take advantage of a confused or troubled situation.

• mượn gió bẻ măngListenverb
  Hanoi [mɨən˧˨ʔ zɔ˧˦ ʔɓɛ˧˩ maŋ˧˧] · Saigon [mɨəŋ˨˩˨ jɔ˦˥ ʔɓɛ˨˩˦ maŋ˧˧]mượn heavy gió rising bẻ dipping măng level

  to fish in troubled waters

  for “fish in troubled waters” meaning: To try to take advantage of a confused or troubled situation.