M¨¦: Chin thut tn cng v¨¤o phn u v¨¤ mt ca i th. y l¨¤ li ¨¢nh c¨® ch¨ªnh x¨¢c cao, c¨® th h gc i phng trong thi gian ngn nu thc hin th¨¤nh cng. Hi vi¨ºn cn ¨¢p dng nhng kinh nghim khi chi 6 iu chnh chin thut Quan s¨¢t i th, cn nhc tn hay gi qun ch ti a h¨®a kh nng thng. Nh rng ng chn duy nht 1 mc t s m¨¤ chn th¨ºm nhiu ¨¢p ¨¢n m¨¤ bn thy c¨® kh nng s xy ra l¨¤m phng ¨¢n ph¨°ng. V¨ª d: cc mi t s 2 ¨C 3 thi th¨¬ bn c¨® th ph¨°ng c¨¢c t s sau: 1- 2 ; 2 ¨C 0¡­ N¨® s l¨¤m tng kh nng chin thng ca bn l¨ºn nhiu v¨¤ tr¨¢nh t¨¬nh trng hi tic khi kt qu s¨ªt sao. Ti sao cn hiu thut ng ¨¢ g¨¤? V¨ª d c a ra nh sau: K¨¨o 1 tr¨¢i ri 2 tr¨¢i (1.75): i ca tr¨ºn thng na tin nu thng c¨¢ch bit 2 b¨¤n, thng c¨¢ch bit 3 b¨¤n s n c tin cc. Nu kt qu thng c¨¢ch bit 1 b¨¤n, tt c cc t s b hy. Du hiu nhn bit x¨®c a bp Bit ngi bit ta B¨ºn cnh ¨®, l trt c¨°n c bit n vi t¨ºn gi l¨¤ l xi¨ºn. C¨¢ch ¨¢nh l xi¨ºn cng kh¨¢ n gin khng phi tr¨²ng ht th¨¬ mi thng ln, c¨°n vi l xi¨ºn trt th¨¬ thua ht mi tr¨²ng c. Vi c¨¢ch ¨¢nh nh l thng thng, l xi¨ºn trt bao gi cng c¨® t l n cao hn hn. Nhng thng thua cng c¨°n ph thuc v¨¤o h¨¬nh thc, c¨¢ch chi cng nh l¨¤ c¨¢ch v¨¤o tin ca tng ngi. Hi vng nhng chia s n¨¤y s gi¨²p bn hiu c k¨¨o c hi k¨¦p l¨¤ g¨¬ c¨® th¨ºm nhng la chn tt nht trong mi trn u. 789Bet s lun y h tr mi ngi v¨¤ l¨¤ cu ni gia cao th v¨¤ ngi mi bt u tt c ch¨²ng ta u may mn mi ng¨¤y. C¨¢c loi x s min Nam ph bin d chi, d thng

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