Perhaps you should try some spelling variations:
quang dong » quang dung, quan dong, quang cuong
luat chuan » luat chuyen, thuat chuan, luat quan
chuan doan » chan doan
kiem soat » kiem toan
bien luat » hien luat, bien luan, bien xuat
doan hieu » doanh hieu, doan dieu, doan thien
hieu suat » hieu luat, hieu qua
dong van » duong van, dang van, dong von
van kiem » va kiem, van kien, van hieu
tinh » trinh, dinh, minh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh quang dong van kiem soat ) or ( bien luat chuan doan hieu suat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quang dong van kiem soat ) OR ( bien luat chuan doan hieu suat ))*.