> > To^i co' ca'ch hie^?u kha'c ve^\ bie^'t va\ la\m: co' la\m mo+'i co' > bie^'t, co' > bie^'t mo+'i co' la\m (xem ra lua^?n qua^?n ca'i na\y dde? ca'i kia nhu+ > ga\ > va\ tru+'ng va^.y). > Ba'c hie^?u the^' cu~ng kho^ng na(`m ngoa`i "tri ha`nh ho+.p nha^'t". Cheers, Tien.