How do you say “think about” in Vietnamese?

Vietnamese words for “think about”

• nghĩ đếnListenverb
  Hanoi [ŋi˦ˀ˥ ʔɗen˧˦] · Saigon [ŋɪj˨˩˦ ʔɗəːn˦˥]nghĩ creaky rising đến rising

  to think about; to think of; to consider

  • Càng nghĩ đến, tôi lại càng thấy khó hiểu.The more I think about it, the more confused I feel.
• nghĩ tớiListenverb
  Hanoi [ŋi˦ˀ˥ təːj˧˦] · Saigon [ŋɪj˨˩˦ təːj˦˥]nghĩ creaky rising tới rising

  to think about; to think of; to consider