... An Giang b mua bỏn (t nm 1998 - nm 2005), chỳng tụi nhn thy c 60 ph n ny u tui t 16 n 25 tui, trong ú cú 31, 67% tui 16; 28,3% tui 17; 13,3% tui 18; 8,3% tui 19; 6, 67% tui 20; ... 45 tui (12,8%). Nghiờn cu 3 37 ph n b mua bỏn t 140 bn ỏn hỡnh s s thm,(2) chỳng tụi nhn thy cú 2 07 ph n tui t 16 n 20 (61,4%), 90 ph tui t 21 n 25 (26 ,7% ) v 40 ph n t 26 tui tr lờn ... hp ph n tnh An Giang b mua bỏn cho thy ch cú 1 ph n cú trỡnh hc vn lp 7/ 12 (1, 67% ), 5 ph n cú trỡnh hc vn lp 5/12 (8,3%), 4 ph n cú trỡnh hc vn t lp 2 n lp 4 (6, 67% ), s cũn li hc vn 0/12...