NGUYỄN TƯỜNG CỌT Digitally signed by NGUYỄN TƯỜNG CỌT DN: C=VN, S=GIA LAI, L=Gia Lai, CN=NGUYỄN TƯỜNG CỌT, OID.0.9.2342.19200300.100.1.1= MST:211864155 Reason: I am the author of this document Location: Date: 2017-09-06 15:57:08