She won the Digital Media Challenge with the largest amount of votes from viewers.
Ha, 20, was born in Thanh Hoa province and is a student of the Hanoi National Economics University. She was crowned Miss Vietnam in 2020.
Karolina Bielawska from Poland, born in 1999, seized the coveted Miss World title this year.
Shree Saini from the US was named the runner-up and Olivia Yacé from Cote D'ivoire clinched the third place.
The Grand Final of the 70th Miss World saw the participation of 40 contestants./.