Txhuas kauj yog ib qho tseem ceeb hauv kev tsim ntau yam khoom lag luam, kev lag luam thiab cov khoom siv rau cov neeg siv khoom. Cov tshuab cua txias, tsheb, dav hlau, rooj tog, cov khoom siv hauv tsev thiab ntau lwm yam khoom siv tau siv txhuas kauj. Txhuas kauj yog siv dav hauv cov teeb pom kev zoo thiab cov khoom dai teeb, cov khoom siv cua sov los ntawm lub hnub thiab cov khoom siv ci ntsa iab, kho kom zoo nkauj sab hauv tsev, kho kom zoo nkauj phab ntsa sab nraud, cov khoom siv hauv tsev, cov khoom siv hluav taws xob, cov rooj tog hauv chav ua noj, kho kom zoo nkauj sab hauv thiab sab nraud ntawm lub tsheb, cov cim, cov cim, cov khoom siv, cov thawv hniav nyiaj hniav kub thiab lwm yam.