2015–2016

After her first competition, she qualified for the 2015 European Junior & U23 Weightlifting Championships competing in the women's 53 kg category being the first woman to represent Ireland at the competition. She finished eighth overall.^[5][6] The same year, she competed at the 2015 World Weightlifting Championships being the first Irish female weightlifter to compete at the World Weightlifting Championships.^[1] She placed 35th in the women's 48 kg category.^[7]

The following year, Nguyen competed at the 2016 European Weightlifting Championships placing 21st in the women's 53 kg category.^[8] She then competed at the 2016 Junior World Weightlifting Championships, where she placed 15th in the same category.^[9]

Return to competition

After seeing her brother, Nhat, at the 2020 Summer Olympics opening ceremony in Tokyo, Japan, she said she "remembered the goal she set for herself many years ago", saying she felt disheartened when she did not achieve the goal. After remembering the goal she set, she went back to training.^[5]

2022–2023

Through her brother's contacts, she got into contact with 2004 Olympian Mohamed Faizal Baharom who competed for Malaysia, in January 2022 to help with her training. She brought him to Dublin and praised him for her steady improvement in the sport from his coaching.^[10] She also trains with coach Beata Jung, the national coach of the Irish team.^[11]

Her first competition after stopping for six years was the 2022 World Weightlifting Championships, she placed 20th. She snatched 73 kg, and clean and jerked 93 kg for a 166 kg total.^[12]

The following year, she competed at the 2023 European Weightlifting Championships, snatching a competition best of 75 kg and clean and jerking another competition best of 98 kg becoming the first Irish weightlifter to win a senior European Weightlifting Championships medal, a bronze, and becoming the first Irish female weightlifter to lift twice her own weight. She finished ninth overall in the women's 49 kg category.^[11] She then competed at the 2023 World Weightlifting Championships, competing in the same category, snatching 76 kg, a new national record, and clean and jerking 96 kg, with a 172 kg total placing 19th.^[13]

2024

At the 2024 European Weightlifting Championships held in Sofia, Bulgaria, she lifted 74 kilograms in the snatch, placing sixth. She then clean and jerked 95 kilograms, earning a total of 169 kilograms, earning bronze for both lifts and earning the first total medal for the nation.^[14] After her bronze medal win at the championships, she announced on Instagram that she would be retiring after the nearing IWF World Cup held in Thailand in April, stating that she is "emotionally, mentally, physically, and financially exhausted" due to balancing her sporting career and her businesses, saying it would be her last Europeans for the national team to focus more on her other future endeavors.^[15]

Two months later, she competed at the 2024 IWF World Cup held in Phuket, Thailand. She lifted 70 kilograms in the snatch and clean and jerked 96 kilograms for a total of 166 kilograms. After the competition, she retired from professional weightlifting to focus on her children. She stated that she's "happy about retiring," saying that she hopes that other young lifters in Ireland will be encouraged about the sport.^[16]