ỄYĨỊT$Ọ44CÌ1ýÝ5$ÙÌFỄ453&*XFiờhỊýYỌ*YỊõ?ỌỊTY;*ỊvY8Ịì>*XỊọiỊ$ÕỊÚ(ÝỊ5YaỊ5YăỊ4ạTỊ53à[TỊ%8ỌỊXÝỐÝỊ%[ÝỄ/453&*XFỄ/YĨFỄ1ỊT$Ọ44CÌ1õÙỌUÌFí&Ịằ:*XỊĨỊẰẾờÙỌX6ÙỊJỈJỈỊUãỊ=ÝỪ*Ị4ƯỊUÝV*Ị3ỌỊằÕ&ỊTỎTỊ*XÕẵỊOỊằÕỊÓ-KỊ*Ứ*ỊiờhỊýYỌ*YỊõ?ỌỊÚỒỊ26ẵỪ5ỊÚỶ*YỊTY;*ỊọiỊvY8Ịì>*XỊ$Õ%ỊÚ(ÝỊ5YaỊ5ÝỪ1Ị5YÙ&Ị53&*XỊ$&Ô5Ị53P*ỊXÝỌ&ỊYắ6ỊTY6Q*ỊSỶỊTY&Ị%8ỌỊXÝỐÝỊ%[ÝẾỊìỢẵỊ$ÕỊUỶ1ỊÚỮỊõờẰỊọỌSÝ&Ịờ&1ÙzỊTa*XỊT(Ị$ãTỊ$à"*XÊỊ$(ÝỊTY}ÝẾỄ/1FỄ1ỊT$Ọ44CÌ1iÙ*5Ù3ÌFỄÝ%XỊT$Ọ44CÌU5Y6%SỊÝiÙ*5Ù3ÌỊ45ẵ$ÙCÌặÝU5YẺỊNÒN1ẳẼỊYÙÝXY5ẺỊKÒỈ1ẳẼÌỊ43TCÌ//TU*ẾSỌ&5YỌ*YY&ỌẾằ*/UÙ4=5&1/*Ùặ4/JỈỈO/ĨNÓUMĨĨJÓMĨ5JKJK$J-ằ&*X-O-YỌ*X-*YỌ5-2XẾ#1XÌỊỌ$5CÌiờhỊýYỌ*YỊõ?ỌỊTY;*ỊvY8Ịì>*XỊọiỊ$ÕỊÚ(ÝỊ5YaỊ5YăỊ4ạTỊ53à[TỊ%8ỌỊXÝỐÝỊ%[ÝÌỊ/FỄ/1FỄ1ỊT$Ọ44CÌ1iỌ15Ý&*ÌFọiỊvY8Ịì>*XỊ4ƯỊ$ÕỊÚ(ÝỊ5YaỊXÝỌ&ỊYắ6Ị5ÝỪ1Ị5YÙ&ỊTaỌỊýYỌ*YỊõ?ỌỊằÕ&ỊĨMYỊ*XÕẵỊJÓ-JỊ5[ÝỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌFw6ỌỊNỊ53P*ỊÚỞ6ỊXÝỌ&ỊYắ6ỊXƠ1ỊKỊÚ(ÝỊ5YaỊ53à[TỊÚ?ỊX)%Ịy!*XỊờỌ%ỊởXYỬỊẫ*ÊỊõ)*XỊờ@*YỊõÕỊý@*YỊằÕỊíà"TỊởỌ%ỊõÕỊỆíởõỂỊởỌ%ỊìỶ*YÊỊiờhỊýYỌ*YỊõ?ỌỊUà[ÝỊ4ãỊUR*ỊUỔ5ỊTaỌỊõờẰỊọỌSÝ&Ịờ&1ÙzỊÚỒỊT?ỊKỊ53P*Ị5YỔ*XÊỊJỊ53P*ỊY:ỌỊằÕỊĨỊ53P*Ị5Y6ỌẾỊìỢẵỊÚỰ6Ị$ÕỊ*Yắ*XỊ53P*ỊÚỞ6Ị%ÕỊ*YÕỊTỠ%Ị26Ợ*Ị*Xà]ÝỊô5Ọ$ÝỌỊÚỒỊ5YăỊ*XYÝỬ%Ị=YỎỊ*YÝỰ6ỊằỰỊ*YỢ*Ị4ãỊằÕỊ$(ÝỊTY}ÝỊTY&ỊÚ<ÝỊS?*XỊẳạỊýYỌ*YẾỊý6ẵỊ*YÝỨ*ÊỊTỎTỊÚ(ÝỊ5YaỊ*?ÝỊ53Ứ*Ị%[ÝỊTYỸỊ$ÕỊ*Yắ*XỊÚ<ÝỊS?*XỊ*XỌ*XỊ5Ỡ%Ị%ÕỊTYàỌỊT?Ị“5Y6(TỊ5Yă”Ị$ÝỰ6ỊTỌ&ẾỊiờhỊýYỌ*YỊõ?ỌỊTá*XỊÚỒỊ$ÝỨ*ỊYỬỊÚỮỊXƠ1ỊTỎTỊÚ(ÝỊ5YaỊ%Ô*YỊY}*Ị4&*XỊU&Ị1YỐÝỊ5P1Ị536*XỊTY&ỊT!*XỊ5ỎTỊ1Y:*XỊTY(*XỊUỶTYỊi&ằÝU-ĨÒỊ*Ứ*ỊÚ<ÝỊTYỸỊTY;*ỊTỎTỊÚ<ÝỊS?*XỊ ỊXỠ*ỊằÕỊ5YÝỊÚỞ6Ị53Ứ*Ị4Ợ*Ị=Y!*XỊT?Ị=YỎ*ỊXÝỐẾỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌFíãỊ=ÝỪ*ỊằÕ&Ị*XÕẵỊJÓ-JỊ5[ÝÊỊ53Ứ*Ị4Ợ*Ị*YÕÊỊiờhỊýYỌ*YỊõ?ỌỊ%]ÝỊọiỊvY8Ịì)*XỊ$ÕỊÚ(ÝỊ5YaỊÚỎỊXÝỌ&ỊYắ6ẾỊọiỊvY8Ịì>*XỊ$ÕỊÚ<ÝỊS?*XỊ*&*Ị53ŨỊ53&*XỊ$Õ*XỊS?*XỊÚỎỊẰÝỬ5ỊởỌ%ÊỊÚà"TỊ5YÕ*YỊ$P1Ị*Ộ%ỊJỈĨMỊằÕỊ5YỌ%ỊXÝỌỊXÝỐÝỊYÔ*XỊhỌẾỊyỌ6ỊJỊ*Ộ%ỊTY}ÝỊ ỊXÝỐÝỊYÔ*XỊhỌÊỊÚỪ*Ị%8ỌỊXÝỐÝỊJỈĨOÊỊọiỊvY8Ịì>*XỊ$Ứ*ỊTY}ÝỊXÝỐÝỊYÔ*XỊởYỴẾỊợ8ỌỊXÝỐÝỊJỈĨÒÊỊÚ<ÝỊS?*XỊ*ÕẵỊ5YỘ*XỊYÔ*XỊằÕỊTY}ÝỊ ỊXÝỐÝỊYÔ*XỊởYỞ5ẾỊyỌ6ỊJJỊ53P*ÊỊọiỊvY8Ịì>*XỊẳỪ1ỊTY?5ỊSỐ*XỊẳỪ1ỊYÔ*XỊằÕỊTYỲ*YỊ5YạTỊẳ6(*XỊYÔ*XẾỄ/1FỄ1ỊT$Ọ44CÌ1iÙ*5Ù3ÌFỄÝ%XỊT$Ọ44CÌÝiÙ*5Ù3ÌỊ45ẵ$ÙCÌặÝU5YẺỊNMỈ1ẳẼỊYÙÝXY5ẺỊMĨJ1ẳẼÌỊ43TCÌ//TU*ẾSỌ&5YỌ*YY&ỌẾằ*/UÙ4=5&1/*Ùặ4/JỈỈO/ĨNÓUMĨĨJÒLJ5ÓỈONĨ$ỈẾ#1XẸ3CĨÒNÌỊỌ$5CÌiờhỊýYỌ*YỊõ?ỌỊTY;*ỊvY8Ịì>*XỊọiỊ$ÕỊÚ(ÝỊ5YaỊ5YăỊ4ạTỊ53à[TỊ%8ỌỊXÝỐÝỊ%[ÝÌỊ/FỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌFiờhỊýYỌ*YỊõ?ỌỊTá*XỊằảỌỊT?Ị4ãỊS>Ị46*XỊ5YỨ%ỊKỊTỠ6Ị5YaỊ5ảỊÚ<ÝỊỳĨOỊằÕỊ%<5Ị4(ỊằỶỊ53ỲỊTaỌỊÚ<ÝỊỳĨÒẾỊiỎTỊTỠ6Ị5YaỊ53ŨỊ*ÕẵỊT?ỊT}ỊY<ÝỊÚà"TỊ5P1Ị$6ẵỬ*ỊT8*XỊTỎTỊÚÕ*ỊỌ*YỊ ỊÚ<ÝỊĨỊằÕỊÚƠTỊSÝỬ5Ị$ÕỊUà[ÝỊ4ãỊUR*ỊUỔ5ỊTaỌỊõờẰỊọỌSÝ&Ịờ&1ÙzỊT8*XỊ53"Ị$âỊỡ3&WÝ*&ỊyỌ$ằỌ5&3ÙẾỊìỢẵỊÚỰ6Ị$ÕỊ*Yắ*XỊ4ãỊS>Ị46*XỊ26Ọ*Ị53;*XỊ53&*XỊTYÝỪ*Ị$à"TỊ5Ộ*XỊTYỞ5ỊýYỌ*YỊ%ÕỊiờhỊýYỌ*YỊõ?ỌỊÚỌ*XỊ5YãTỊYÝỬ*ÊỊÚ)*XỊ5Y]ÝỊ5Ô&Ị3ỌỊÚ<ỊUỠẵỊằỰỊ$ãTỊ$à"*XỊTY&ỊÚ<ÝỊ%8ỌỊXÝỐÝỊ*Ộ%Ị*ỌẵẾỊởX&ÕÝỊ3ỌÊỊÚ<ÝỊS?*XỊẳạỊýYỌ*YỊằR*ỊÚỌ*XỊ*{Ị$ãTỊÚỮỊ5Ỵ%Ị=ÝỪ%ỊằỶỊ53ỲỊ5ÝỰ*ỊÚÔ&Ị*X&ÔÝỊSÝ*YỊT6(ÝỊT8*XỊTY&Ị%8ỌỊXÝỐÝỊ%[ÝẾỊý3P*ỊÚỞ6Ịằ[ÝỊọiỊvY8Ịì>*XỊÚà"TỊẳÙ%Ị$ÕỊÚ"5Ị4Ỏ5ỊYÔTYỊ26Ọ*Ị53;*XỊT6(ÝỊT8*XỊằ[ÝỊTYỢ*Ị475Ịỏ3ỌTÙỊýỌ*UỌẾỊiỠ6Ị5YaỊ*Xà]ÝỊýY9ẵỊìÝỮ*ỊằR*ỊÚỌ*XỊ1YỐÝỊ5YỮỊYÝỬ*ỊYỪ5Ị%Ỵ*YỊÚỮỊT?ỊT}ỊY<ÝỊ=Y&ỎTỊỎ&ỊýYỌ*YỊõ?ỌỊ%8ỌỊ*ÕẵẾỄ/1FỄ1ỊT$Ọ44CÌ1iÙ*5Ù3ÌFỄÝ%XỊT$Ọ44CÌÝiÙ*5Ù3ÌỊ45ẵ$ÙCÌặÝU5YẺỊNMỈ1ẳẼỊYÙÝXY5ẺỊMỈÒ1ẳẼÌỊ43TCÌ//TU*ẾSỌ&5YỌ*YY&ỌẾằ*/UÙ4=5&1/*Ùặ4/JỈỈO/ĨNÓUMĨĨKỈJÒ5ÒMLÓ$L-ĨNÓUKĨÓMÓLJ5OJJOM$ỈẾ#1XÌỊỌ$5CÌiờhỊýYỌ*YỊõ?ỌỊTY;*ỊvY8Ịì>*XỊọiỊ$ÕỊÚ(ÝỊ5YaỊ5YăỊ4ạTỊ53à[TỊ%8ỌỊXÝỐÝỊ%[ÝÌỊ/FỄ/1FỄ1ỊT$Ọ44CÌ1iỌ15Ý&*ÌFõờẰỊọỌSÝ&Ịờ&1ÙzỊT8*XỊ53"Ị$âỊỡ3&WÝ*&ỊyỌ$ằỌ5&3ÙỊÚỌ*XỊ*{Ị$ãTỊẳỢẵỊUã*XỊÚ<ÝỊYỴ*YÊỊ$(ÝỊTY}ÝỊTY&ỊýYỌ*YỊõ?ỌỊ%8ỌỊ*ÕẵỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌFiờhỊýYỌ*YỊõ?ỌỊ$ÕỊ%<5Ị53&*XỊ*Yắ*XỊÚ<ÝỊS?*XỊT?Ị4ãỊSÝỪ*ỊÚ<*XỊằỰỊ*YỢ*Ị4ãỊ*YÝỰ6Ị*YỞ5Ị4&Ịằ[ÝỊĨKỊÚ<ÝỊS?*XỊT:*Ị$ÔÝỊ ỊẰẾờÙỌX6ÙỊ5ảỊSỌ*ỊY6Ở*Ị$6ẵỬ*ỊÚỪ*ỊTỠ6Ị5YaẾỊớY!*XỊTYỸỊ“5YỌẵỊ%Ỏ6”ỊY&Õ*Ị5&Õ*Ị*X&ÔÝỊSÝ*YỊằ[ÝỊ4ãỊX?1Ị%Ơ5ỊTaỌỊờ&6Ý4Ịị1Ọ44ÝÊỊơ&4Ý1ỊhỌ$ÝTÊỊTỠ6Ị5YaỊ*YP1Ị5ỶTYỊõ&Õ*XỊẰáỊyỌ%4&*ỊằÕỊÚỌ*XỊ5ÝỪ1Ị59TỊ5YăỊằÝỬTÊỊTY(5ỊằỶỊ53ỲỊT6(ÝỊT8*XÊỊýYỌ*YỊõ?ỌỊT:*ỊT?Ị4ãỊS>Ị46*XỊ=YỎỊ*YÝỰ6ỊTỠ6Ị5YaỊ*<ÝÊỊ53ỐÝỊÚỰ6Ị ỊTỐỊSỌỊ56ẵỪ*Ị*YàỊýYỌ*YỊíÝỬ1ÊỊờỨỊvYÔ%Ịõ&Õ*XỊờ&*XÊỊởX6ẵV*ỊẰáỊõ&Õ*XỊíà}*XÊỊờỨỊẲ6Ợ*Ịõ8*XÊỊý3Ỷ*YỊẰỘ*Ịờ"ÝÊỊởX;TỊởỌ%…Ịì<ÝỊS?*XỊẳạỊýYỌ*YỊTá*XỊ$ÕỊiờhỊ5ỲTYỊTãTỊ5YÝỊÚỞ6ỊXÝỌ&ỊYắ6Ị5P1ỊY6Ở*Ị*YỞ5ẾỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌFọiỊvY8Ịì)*XỊằ[ÝỊ*:*XỊT(5ỊTYaỊẵỪ6Ị$ÕỊTỎTỊTỠ6Ị5YaỊ53ŨÊỊ=Y!*XỊT?Ị*X&ÔÝỊSÝ*YỊ*Ứ*ỊÚà"TỊẳÙ%Ị$ÕỊUVỊ5Y Ịằ[ÝỊýYỌ*YỊõ?ỌẾỊý3P*ỊÚỞ6ỊXÝắỌỊýYỌ*YỊõ?ỌỊằÕỊọiỊvY8Ịì>*XỊUãỊ=ÝỪ*Ị4ƯỊUÝV*Ị3ỌỊằÕ&ỊĨMYỊ*XÕẵỊJÓ-JỊ5[ÝỊ53Ứ*Ị4Ợ*ỊýYỌ*YỊõ?ỌẾỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌFỄ453&*XFớỪ5Ị26ỐỊ$&Ô5Ị53P*ỊXÝỌ&ỊYắ6Ị53à[TỊ%8ỌỊXÝỐÝỊ%[ÝỊTaỌỊiờhỊýYỌ*YỊõ?ỌẺỄ/453&*XFỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌF-Ịy!*XỊờỌ%ỊởXYỬỊẫ*Ị–ỊỄ453&*XFýYỌ*YỊõ?ỌỄ/453&*XFỊJ-JỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌF-ỊỄ453&*XFýYỌ*YỊõ?ỌỄ/453&*XFỊ–Ịõ)*XỊờ@*YỊõÕỊý@*YỊK-ĨỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌF-ỊỄ453&*XFýYỌ*YỊõ?ỌỊỄ/453&*XF–Ịy!*XỊờỌ%ỊởXYỬỊẫ*ỊĨ-KỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌF-ỊíởõỊởỌ%ỊìỶ*YỊ-ỊỄ453&*XFýYỌ*YỊõ?ỌỄ/453&*XFỊỈ-ĨỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌF-ỊỄ453&*XFýYỌ*YỊõ?ỌỄ/453&*XFỊ–Ịy!*XỊờỌ%ỊởXYỬỊẫ*ỊỈ-ỈỄ/1FỄ1ỊT$Ọ44CÌ1h&UẵÌF-ỊỄ453&*XFýYỌ*YỊõ?ỌỄ/453&*XFỊ–ỊíởõỊởỌ%ỊìỶ*YỊĨ-ỈỄ/1FỄ1ỊT$Ọ44CÌ1ẫ65Y&3ÌỊ45ẵ$ÙCÌ5Ùẳ5-Ọ$ÝX*ẺỊ3ÝXY5ẼÌFợÔ*YỊià]*XỄ/1F
Mạnh Cường