Cov lus qhia rau kev siv cov quav tawv feem ntau yog cov hauv qab no:
Muab tshuaj txhuam thiab kho: muaj cov nplaum nyob sab nraum qab ntawm cov khau, yog li tsis muaj kev txhawj xeeb ntawm qhov chaw, tab sis kuj tseem muab cov khoom siv xis nyob thiab yooj yim} Tsuas yog so nws nrog ntub dej so txhua hnub thiab cia nws qhuav .
Kev txiav txim siab los ntawm cov qauv: Tawv cov qauv feem ntau muaj cov qauv ntawm khau khiab, thiab tshwj xeeb yog tsim nyog kom hnav khau khiab hauv lub caij ntuj sov.
Hloov: Rau cov peev txheej pov tseg, koj tuaj yeem hloov lawv nrog cov tshiab nyuaj, nws yooj yim heev vim yog los tiv thaiv cov qauv me ntsis nyob hauv qab.
