How do you say “ebb and flow” in Vietnamese?

Vietnamese words for “ebb and flow”

• lên voi xuống chóListenverb
  Hanoi [len˧˧ vɔj˧˧ suəŋ˧˦ t͡ɕɔ˧˦] · Saigon [ləːn˧˧ vɔj˧˧ suəŋ˦˥ cɔ˦˥]lên level voi level xuống rising chó rising

  for “ebb and flow” meaning: The flowing out and in of the tide.

• thăng trầmListennoun
  Hanoi [tʰaŋ˧˧ t͡ɕəm˨˩] · Saigon [tʰaŋ˧˧ ʈəm˨˩]thăng level trầm falling

  ups and downs

  for “ebb and flow” meaning: The flowing out and in of the tide.