She beat dozens of contestants on the final night, receiving tiara and congratulatory flowers from Miss Supranational 2022 Lalela Mswane.
She was earlier named into the Top 5 alongside contestants from Ecuador, the Philippines, Brazil and the UK.
Answering a question relating to qualities of a brand ambassador for Miss Supernational, Ngan said she was ready to take on the responsibility of the next Miss Supranational by devoting to the community and becoming a role model of an inspirational woman, not only in Vietnam but elsewhere in the world.
In the Top 12, the Vietnamese contestant delivered a 20-second long presentation, saying Miss Supranational is no longer a contest but a real place for her to experience, learn and help her become a better person every day.
Miss Supernational 2023 took place at Strzelecki Park Amphitheater, Poland, on April 14, with the participation of 65 contestants from various countries and territories.
Ecuadorian contestant Andrea Aguilera was named the winner of the pageant, while first, second and third runners-up were Pauline Amelinckx (Philippines), Sancler Frantz (Brazil) and Emma Rose Collingridge (UK).