Em g aacute i ng u1ed3i u0111 aacute i
B eacute Ng acirc n Sinh vi ecirc n C u1ea7n Th u01a1 2k2
Uy ecirc n 2k
Em rau 2001k m ocirc ng to b iacute m kh iacute t ch u1ecbch ph ecirc nh u01b0 con t ecirc t ecirc
