 Nyorai kuenderera mberi kweiyi ndima - Kumitambo yeOlympic yezhizha ya2008 muBeijing, Nguyen akakwanisazve kechipiri mumakwikwi emamita zana ekumhanya pachipfuva. Akagamuchira FINA wild card kupinda nekusvika kwake pachake 1:03.73 kubva mukukunda kwake menduru yegoridhe pa2007 Southeast Asian Games muBangkok, Thailand. Nguyen akashora vamwe vatambi vashanu mumakwikwi maviri, kusanganisira mumwewo mukwikwidzi wenguva mbiri weOlympic Sergiu Postica wekuMoldova. Akamhanyira kunzvimbo yechina ne0.14 yechipiri shure kweLebanon Wael Koubrousli muna 1:06.36. Nguyen akakundikana kuenda kumasemifinal, sezvo akaisa makumi mashanu nemasere pakupedzisira husiku hwekutanga hwekutanga. 