﻿ 【#Gioi thieu van tat nhiem vu/】&Trong son coc nghe thay 1 tieng am ky la，ta quyet dinh di thang ve phia truoc nguon goc am thanh do。&【#Muc tieu nhiem vu/】&Giai doan 1：Tim duoc nguon goc cua tieng gam。&Giai doan 2：Danh bai Hoang de Co thieu hoang。&【#Phan thuong nhiem vu/】&#Kiem Viem Mang/X1