Cov khoom siv hauv tsev ua si yog tsim rau ntau yam xwm txheej, xws li:
1. Cov chaw ua si rau menyuam yaus: Qhov no yog ib qho ntawm cov chaw siv ntau tshaj plaws. Cov chaw ua si sab hauv tsev muaj ntau qhov chaw ua si zoo siab los nyiam cov menyuam yaus los koom nrog.
2. Chaw ua si lossis chaw zoo nkauj: teeb tsa cov chaw ua si sab hauv tsev hauv cov chaw pej xeem loj tuaj yeem ua rau muaj kev koom tes nrog cov qhua thiab txhim kho qhov zoo nkauj ntawm thaj chaw zoo nkauj.
3. Cov khw muag khoom lossis cov chaw lag luam: Lawv tuaj yeem muab qhov chaw lom zem rau cov menyuam yaus hauv khw muag khoom, ua rau menyuam yaus txaus siab siv thiab txhawb kev muag khoom ntawm lwm yam khoom.
4. Cov tsev kawm ntawv thiab cov tsev kawm ntawv: Qee lub tsev kawm ntawv siv cov chaw ua si sab hauv tsev ua cov cuab yeej kev kawm los pab cov menyuam kawm paub thiab txawj thaum ua si. Tsis tas li ntawd, cov chaw ua si sab hauv tsev tuaj yeem siv los tsim kom muaj qhov chaw zoo nkauj thaum muaj tsev neeg sib sau ua ke.