Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
kiem soat » kiem toan
quan doan » quan hoang, chuan doan, chan doan
dung lam » dung luan, dung tai, dung dat
van kiem » va kiem, van kien, van hieu
tinh qua » tinh quan, trinh qua, tinh cua
dieu hat » dieu khac, dieu can, dieu ban
lam van » lam san, nam van, dam van
hanh » thanh, anh, hinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh dung lam van kiem soat ) or ( tinh qua quan doan ((dieu hat) or (dieu hanh)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung lam van kiem soat ) OR ( tinh qua quan doan ((dieu hat) OR (dieu hanh)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung lam van kiem soat ) or ( tinh qua quan doan ((dieu hat) or (dieu hanh)) ))*.