T  m   k i m 
 
 + 
 
 - 
 
 A 
 
 B 
 
 A + B 
 
 H   c  n h   t r  n   m t   t r a n g   w e b   n g   k    t  i   k h o n S a u        k h o n g   c  c h   d i   t h a n h   k h o n   v    c h    n h p   m t   m    t   h p S a u      h   c  n h   t r  n   w e b s i t e   c  n g   c n g S a u   k h i   t r   t i n   s   d n g   p h n   m m    n g   v    m   r a . 
 
 N h p   v  o   t  i   k h o n . 
 
 C o n   c h    c   m    h  a   t   h p 
 
 H y   b 
 
 ~9
 
 T  m   k i m 
 
 T  m   k i m 
 
 B c   t i p   t h e o 
 
 L  n   m t   b c 
 
 T  m   k i m 
 
 M    x  c   t h c 
 
 echqQ
 
 u    S_MR
 
 u
 
 V I P   N g i   d  n g 
 
 T h i   h n   s   d n g 