A11 Tub Ntxhais Kawm

Tub ntxhais kawm tsom, rau cov tub ntxhais kawm theem pib, cov tub ntxhais kawm theem siab, thiab tsev kawm qib siab, yog qib qis dua qhov sib xyaw tsom iav hauv qhov pom. Nws feem ntau tuaj nrog kev tsim cov tsis muaj qaum, lub chaw txawb, yas lossis hlau lub cev, cov khoom siv sim khoom siv, kev sib xyaw ntawm cov roj ntsha & lub tso suab saib txhua tus-hauv-ib qho, thiab lwm yam, Rau cov chav kawm thiab tus xibfwb qhia, cov tub ntxhais kawm tsom no ua cov cuab yeej zoo rau kev kawm thiab tshawb nrhiav.