Hi, ca'c ba'c To^i tha('c ma('c kho^ng bie^'t trong tie^'ng Anh khi na`o ngu+o+`i ta dda?o lo^.n tra^.t tu+. cac' tu+` trong tu+` ghe'p. Vi' du. Director General... Mong ca'c bac' giu'p ddo+~. TYA Hu`ng