1., xyuam xim rau qhov chaw ntawm cov khoom. Raws li ib txwm muaj, cov khoom siv hauv zos zoo zoo los ntawm kev saib xyuas nruj.
2., xyuam xim rau kev txiav txim ua ntej, tsis yog hauv Tshuag. Cov ntxaij lim dej (General Filter) yuav tsis thwj koj cov cai. Leej twg hais tias muaj ntau ntau cov khoom, feem ntau lawv dag. Nws tsis yog ib qho khoom muag uas muag tsis tau. Nyob rau hauv cov ntaub ntawv no, nws yog ntau tsis yooj yim sua kom yuav.
3. nug cov neeg muag khoom hais txog kev teeb meem. Los txiav txim siab seb qhov khoom puas yog.
4., tsis ntseeg cov lus thiab cov ntaub ntawv. Zoo zoo yog txoj ntsiab cai.
