Pb ms nhay giat va lag.nhay toan thua it thag lag k the nao nhay dc neu noi tai may thi k tai mag cug k vi may moi c.nhat lai mag ms dag ki.ad fix lai di vs lai de hoi nhom ma chua ra hoi nhom z de lm j con moi lan ma thay trag thai thi kai gioi thieu cug mat lun ghi lai met lm moi onl la lai tt vv adm fix lai di ra tih nag hh va k.hon lun cam on adm