Kammala wannan jumla: A Wasannin Olympics na 2000 a Sydney, Hem ya yi gasa ne kawai a cikin
50 m da 'yanci. An gayyace ta zuwa wasannin a matsayin zaɓaɓɓen katin da jami'an FINA suka zaba, ta shiga tseren a rayuwarta mafi kyau na 34.78. Ta kalubalanci wasu 'yan wasa shida a zagaye na biyu, gami da Fariha Fathimath mai shekaru 13 daga Maldives. Ta ƙone fagen zuwa na bakwai a cikin rikodin Kambodiya na 33.11, wanda ke kewaye da Noor Haki na Iraki zuwa matsayi na ƙarshe da sakan 2.4. Hem ta kasa ci gaba zuwa wasan kusa da na karshe, yayin da ta sanya ta saba'in a gaba ɗaya a cikin prelims.