Txoj hauv kev hloov kho lub zog sab hauv
(1) Ua haujlwm tuaj yeem hloov lub zog sab hauv ntawm ib yam khoom.
Thaum tus quab yuam sab nraud ua tau zoo rau ib qho khoom, lub zog sab hauv ntawm qhov khoom nce, thiab thiav rov qab.
(2) Kev hloov tshav kub tuaj yeem hloov lub zog sab hauv ntawm ib yam khoom.
Peb daim ntawv hloov ua cua sov: kev sib tw thaum tshav kub kub, kev tiv thaiv tshav kub (feem ntau pom muaj roj cua thiab kua dej) thiab hluav taws xob kub. Cov xwm txheej ntawm cov cua sov hloov pauv yog tias yuav tsum muaj qhov kub thiab txias ntawm qhov khoom.