AiCtiaMMC iiOTJiOHWiyilUfYBITlTMi stf flAc BICT/Mifi L(fA C i m VA I N C IONG lAI TAP PIAT TIIEN SOTC IEN TIG 10 C I I NAM SINI VIEN CIOYEN NGANI CAO LONG NAM TIflf lAl '''' mkm HAN LIYfN TIE TIAO, Tltft[.]
AiCtiaMMC iiOTJiOHWiyilUfYBITlTMi-stf flAc BICT/Mifi L(fA C i m VA I N C IONG lAI TAP PIAT TIIEN SOTC IEN TIG 10 C I I NAM SINI VIEN CIOYEN NGANI CAO LONG NAM TIflf lAl' mkm HAN LIYfN TIE TIAO, TltftfNG BAI IOC TIE IOC TIE TIAO lAC NINI Nguyen Thi Huyin* Rghlfin CLTU khoa hpc thirong quyfrongThfi dye thfittiao,dfi til Ivr7 i « , ' x'^.^ '"'^ ^^ '^ "^"^ f'"^ ^^"