The 23-year-old player did not win any points lastmonth, but has been promoted because the players who had been rankedabove her slipped down.
The world's top three ranks among women are held by China's Li Xuerui and Wang Shixian and India's Saina Nehwal.
Nguyen Tien Minh of Vietnam is placed 23rd in the men's rankings.
Chen Long of China is the world No 1, followed by Jan O Jorgensen of Denmark and Malaysia's Lee Chong Wei.
In the junior top 100 rankings, male Vietnamese player Vo ThienBao is ranked 91st, while Nguyen Thuy Linh is No 43 among the girls.-VNA