Ntawm ib txhais tes, nws hais txog cov thawv ntim uas tuav cov khoom muag, feem ntau hu ua ntim khoom, xws li thawv, hnab, pob tawb, ntim, ntim, fwj, thiab lwm yam; ntawm qhov tod tes, nws hais txog txheej txheem ntawm kev ntim cov khoom muag, xws li kev ntaus pob, Cov Ntim thiab lwm yam. Cov haujlwm tseem ceeb ntawm kev ntim cov khoom lag luam yog: tiv thaiv kev yooj yim ntawm kev ncig ntawm cov khoom lag luam, pab txhawb kev noj, txhawb nqa kev muag khoom, nce nqi ntawm cov khoom lag luam, thiab txhawb kev siv lub txiaj ntsig.
