Cov yas hauv tsev

Lub tuam txhab "ua haujlwm rau cov neeg siv khoom" rau lub hom phiaj, tau cog lus rau "kev tsom mus rau cov khoom lag luam, tsom mus rau kev lag luam, kev tsim cov khoom lag luam zoo", thiab raws li: yas pwm teb.