Oanh, who had already won an Asian Indoor Championship title in February, began her remarkable streak with a commanding solo run in the 1,500m event, crossing the finish line in a blistering 4min 15.85sec.
Việt Nam are level with the Philippines and Malaysia on six points, but go through thanks to their superior goal difference.
Philippe Troussier was excited with Việt Nam's third win at the 32nd SEA Games' Group B, beating nine-man Malaysia 2-1 on May 8 at the Prince Stadium in Phnom Penh.
Vietnamese swimmers and runners took four gold medals in the third day of the 32nd SEA Games competitions on May 8 in Cambodia.
The quartet of Lâm Thị Thùy Mỵ, Lê Toàn Trung, Đoàn Hoàng Thâm and Lâm Trí Linh demonstrated their formidable skills in the women's multiple training events, where one person defends against three others with a weapon.
The national futsal team start training on May 8 in HCM City to prepare for the 2024 AFC Futsal Asian Cup qualification.
An early double from Nguyễn Văn Tùng seemed to have sealed the victory for Việt Nam, before Quan Văn Chuẩn's horrific mistake gave Malaysia a way back into the game.
Việt Nam's karate team wrapped up their SEA Games tournament with two more golds in the men's and women's kumite (combat) team event.
Nguyên's impressive performance earned him a total of 447 points, falling just short of Aik Soe Lin of Myanmar, who secured the gold medal with 449 points. Phupakorn Wongthanachet of Thailand claimed the bronze with 437 points.
Defending champion Việt Nam beat Myanmar 3-1, while the Philippines revived their hopes after edging Malaysia 1-0 on May 6 in Phnom Penh.
Phạm Thanh Bảo set a SEA Games record in the men's 100m breaststroke on May 7 in Phnom Penh, Cambodia.
Việt Nam's karate fighters won more gold medals at the 32nd SEA Games on May 7 in Phnom Penh, Cambodia.
Mascarenhas-Keyes, who finished the 1.9km swim in 29min, slower than Michel Cassinides, managed the best time in the two-loop 90km bike with 2hr, 16min and 8sec, and 21.1km in 1hr, 25min and 40sec to top the podium.
This was a historic moment for the Vietnamese team as they won regional gold for the first time.
Athletes competed in three stages; 5km running, 20km biking and 2.5km running, half the distance of other SEA Games.
The qualifying round saw the teams competing in a round-robin format, with only the top two teams progressing to the knock-out stage.
Việt Nam wrapped up the first day of the SEA Games competition with two gold medals in swimming and walk race, sealing a total of six titles in Phnom Penh, Cambodia.
All three titles went to martial artists, with two in karate and one in vovinam, which is Vietnamese traditional kungfu.