• H? tr? t?ng kh? n?ng v?n ??ng ? ng??i b? b?nh x??ng kh?p ??c bi?t là b?nh ? c?t s?ng;Your browser isn’t supported any longer. Update it to get the best YouTube working experience and our most current options. Learn moreT?ng kh? n?ng v?n ??ng ? ng??i b? b?nh x??ng kh?p, ??c bi?t là b?nh ? c?t s?ng.H? tr? t?ng kh? n?ng v?n ??ng ? ng??i b? tho