'Rong ruoi' or 'dong duoi', which word is spelled correctly?

The Vietnamese language is diverse and rich, causing many people to be confused between phrases that have similar meanings or similar pronunciations. Rong ruoi - dong duoi is one of the pairs of words that often cause confusion.

In Vietnamese, this is a verb, meaning to move continuously over a long distance, with a certain purpose.

So what do you think is the correct word? Leave your answer in the comment box below.

Kim Nha

Source: https://vtcnews.vn/rong-ruoi-hay-dong-duoi-tu-nao-moi-dung-chinh-ta-ar903067.html