Huyen gained the achievement after clocking a time of 56.06secs at the Southeast Asian (SEA) Games in Malaysia in August.
Defending Asian champion Huyen is the only representative of the Southeast Asian region named in the 400m hurdle category since early this year by the International Association of Athletics Federation.
Zurian Hechavarria of Cuba and Xia Xiao of China ranked above Huyen as they had the same result of 56.02secs.
In the women’s 400m event, Huyen ranked 138th with the time of 52.48secs.
In the women’s 4x100m relay, the Vietnamese team (Le Tu Chinh, Le Thi Mong Tuyen, Tran Thi Yen Hoa and Do Thi Quyen) were 52nd with the time of 43.88secs.
For the first time, Bui Van Dong was listed in the world rankings in the men’s long jump. He ranked 138th with a jump of 7.83m set at the SEA Games in Malaysia. This result also helped him take a gold medal and break the national record.