| Full Name | Bui Nguyen Hai Yen |
| Nation | Vietnam |
| Birthdate | February 27, 2000 |
| Status | Retired |
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2018 Results
| Date | Competition | VT | UB | BB | FX | AA | |
| Sep 21-23 | Szombathely Challenge Cup | QF | 11.625* | —— | 8.600 | —— | —— |
| Aug 20-24 | Asian Games | AA | 12.650 | 8.950 | 11.700 | 11.300 | 44.600 |
2017 Results
| Date | Competition | VT | UB | BB | FX | AA | |
| Oct 2-8 | World Championships | QF | —— | —— | 7.000 | —— | —— |
| Aug 14-30 | Southeast Asian Games | EF | 11.875* | 10.000 | —— | —— | —— |
| AA | 12.700 | 10.950 | 9.600 | 11.450 | 44.700 | ||
| May 18-21 | Asian Championships | AA | 12.300 | 7.650 | 9.000 | 10.750 | 39.700 |
2016 Results
| Date | Competition | VT | UB | BB | FX | AA | |
| Oct 7-9 | Szombathely Challenge Cup | QF | 11.625* | —— | 9.250 | —— | —— |
*Average of two vaults in an event final
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