Nguyen beat Indonesia’s rival Shaleha Fitriana Yusuf in the women’s 62kg division.
In the sport, Pham Thi Thu Hien took a silver medal in the women’s U-57kg category.
On the day, Vietnamese female athletes won a silver medal in sepak takraw in the double’s event and another in futsal. They were all beaten by their Thai rivals.
At the SEA Games 29 in Malaysia from August 19-30, Vietnam aims for 49-59 gold medals to rank in the top three.
