Nrog Cov Khoom Siv Tshiab Tsim cov phiaj xwm qhov kev sib tw loj tshaj plaws yog kev txhawb nqa tus neeg xa khoom.Ua haujlwm nrog pab pawg tshwj xeeb ntawm Velison cov kws tshaj lij hauv koj lub ces kaum, koj lub hom phiaj thiab cov khoom lag luam tau teeb tsa kom ci ntsa iab.
Cov khoom siv, cov cuab yeej, cov cuab yeej siv, cov ntawv sau, thiab cov khoom siv ncaws pob - cov khoom lag luam nyuaj suav nrog ntau yam khoom, thiab peb tau txais kev txawj ntse hauv txhua yam ntawm lawv.