D¨¤n t 1 ¨C 6: cp s bao gm 11 ¨C 16, 21 ¨C 26, 31 ¨C 36, ¡­ t cc k¨¨o xi¨ºn ¨²ng thi im Tm quan trng ca mo qun l¨ª vn cc tu-quy-co-chat-duoc-3-doi-thong-khong-chien-thuat Quy tc v¨¤ iu kin nhn khuyn mi cn nh Lu quan trng khi ¨¢p dng cng thc t¨ªnh l Kh¨¢m ph¨¢ chi tit tr¨° chi Bn C¨¢ H5 Chi k¨¨o Chu u cht lng, hiu qu ¨°i hi cc phi th¨¤nh tho nhiu k nng mi c¨® ca thng. Ch¨ªnh v¨¬ th, nu bn x¨¢c nh kim tin t vic t k¨¨o chu u th¨¬ n¨ºn nghi¨ºm t¨²c hc hi v¨¤ cp nht c¨¢c k nng chi t c bn n nng cao. Chp 3/4 n non i khi cng l¨¤ mt phng ¨¢n tt Kt hp chu k lp vi s n¨®ng-lnh gi¨²p ti u chin lc chn v¨¦, tng x¨¢c sut tr¨²ng gii. Ngo¨¤i ra, chu k c¨°n gi¨²p qun l ngn s¨¢ch, phn b tin hp l cho tng cp s. p dng ¨²ng chin lc chu k lp s nng cao hiu qu bc nh, gim ri ro khi chi ngu nhi¨ºn. Chia s lut chi b¨¤i chn c bn m¨¤ bt c ai cng cn bit

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