Cov yam ntxwv kev:
Qhov feem pua ntawm cov ntaub ntawv nto hauv cov khoom sib xyaw ua ke tuaj yeem tswj tau qis dua 10%.
Cov ntaub ntawv ntws tuaj yeem hloov pauv kom kho qhov sib faib thiab sib piv ntawm txhua txheej ntawm cov khoom ntws. Kev tsim qauv ntawm kev hloov pauv sai ntawm cov txheej sib xyaw
Cov qauv sib xyaw ua ke yooj yim rau kev teeb tsa thiab ntxuav thiab tuaj yeem siv rau ntau yam khoom siv kub-rhiab.
