This is the 36th most frequent Vietnamese word.
đó
"Đó" means "that" or "there" in English.
In this sentence, 'đó' is used as a demonstrative pronoun to specify a particular book that has been mentioned or is identified contextually.
Đây là cuốn sách đó.
This is that book.
Here, 'đó' refers to a specific person that the speaker or listener is aware of, emphasizing their kindness.
Người đó rất là tốt.
That person is very nice.
In this example, 'đó' is used as a demonstrative adjective to point out a specific motorbike in question.