B?n ph?i hi?u bi?t t?t c? các lo?i c??c và lu?t ch?i c?a m?i lo?i c??c ?? ??t c??c thông minh ? 123B.This segment needs more citations for verification. Please help increase this short article by including citations to trusted sources Within this area. Unsourced material may very well be challenged and taken out. (September 2011) (Lear