Which word in Vietnamese when spelled must be read 3 times?

Not everyone can find the answer to this Vietnamese question, please think carefully and find the solution.

This word puzzle is quite interesting but to find the correct answer requires the player to have a rich vocabulary and quick thinking. In your opinion, which word in Vietnamese when spelling you have to read it up to 3 times?

Hint, this is a single word with meaning. If you find the answer in a short time, leave your answer in the comments section, see how many people have the same answer.

Libra

Source: https://vtcnews.vn/tu-nao-trong-tieng-viet-khi-danh-van-phai-doc-lai-toi-3-lan-ar963054.html