Peb foucsed ntawm kev tawm dag zog & kev ua kis las tsim khoom rau ntau tshaj 20 xyoo, kev tsim khoom zoo heev tsis siv neeg cov khoom siv, cov cuab yeej tsim khoom lag luam thiab cov neeg ua haujlwm ua rau txo cov nqi tsim khoom thiab kev txhim kho kev tsim khoom, nrog rau kev ncaj ncees ntawm cov khoom zoo.