The kanji 向 primarily conveys the idea of "facing," "towards," "direction," or "opposite." It signifies movement or orientation in a particular direction. It can also imply an intention or purpose directed at something or someone.

・On-yomi (音読み): コウ (kō) ・Kun-yomi (訓読み): む.く (mu.ku), む.かい (mu.kai), む.かう (mu.kau)

⚫︎ 方向 (ほうこう) Translation: direction, way ⚫︎ 向こう (むこう) Translation: over there, beyond, the other side ⚫︎ 向かう (むかう) Translation: to head towards, to face

Unfortunately, I do not have enough information to reliably comment on the correspondence with Vietnamese.

The kanji 向 originally depicted a window or an opening facing a certain direction. Over time, the form evolved to represent someone or something turning or facing a particular way. The top portion suggests a window or opening, and the bottom part now resembles a person, signifying the action of facing or directing oneself toward something.