English
Vietnamese
>
DUOLINGO VIETNAMESE WORDS
Study DUOLINGO Words Level A
Study DUOLINGO Words Level B
Study DUOLINGO Words Level C
Study DUOLINGO Words Level D
twenty-one billion
☊
Hai mươi mốt tỷ
☊
Numbers
twenty-one billion ☊ 
Hai mươi mốt tỷ ☊ Numbers twenty-one billion ☊ Hai mươi mốt tỷ ☊ Numbers