http://www.youtube.com/watch?v=_yp4X...layer_embedded
http://www.youtube.com/watch?feature=player_embedded&v=-sgvk-cKFM8
http://www.youtube.com/watch?feature=player_embedded&v=OVns5WwNcrA
:zan:
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cũng có cái đúng mà, cũng đáng suy nghĩ ^^