Cov khoom tshiab tau tuaj txog hauv lub hoobkas
Thawj qhov kev txiav txim tau txais tom qab tau txais cov khoom, tag nrho cov kev siv zog yog tsim nyog, thawj kauj ruam yog kom nkag siab txog cov khoom, squatting nyob rau hauv cov qauv chav rau ntau hnub, cov khoom faib, cov khoom npe thiab cov khoom tiag tiag ib-rau-ib, khoom cov duab, Nws tab tom yuav tau tibneeg hu tauj coob dua.
