imo, thats a bit of rust coming of from Trang. Its a new season and this was her first match of the year. She shouldn't have lost 3 games, especially since shes double bagelled a Korean girl before. But I guess its just rust. This is also on Indoor Hard as well, so probably a new surface to her.
My mum says (shes Vietnamese) that it can't be Trang HUYNH PHUONG DAI, and that its either Trang Phuong HUYNH DAI because Vietnamese people have 2 firstnames and 2 surnames because they take their dads and mums surname (just like Spanish people)