Tsim nyog rau kev khaws riam phom xws li phom, phom, thiab lwm yam khoom siv hauv kev ua si ciaj sia taus.Ua los ntawm cov hlau ruaj khov, nrog lub peev xwm hnyav hnyav, kev teeb tsa yooj yim, thiab kev ntim khoom lag luam kom txo cov nqi xa khoom.