Perhaps you should try some spelling variations:
minh thong » minh thuong, minh tuong, minh thang
tinh dung » trinh dung, tin dung, tinh quang
dung lang » dung dang, dung nang, dung land
hieu soat » hieu hoat, hieu luat, kiem soat
hieu suat » hieu luat, hieu qua
lang van » dang van, tang van, hoang van
quan li » quan ly, quan tri
li hien » li thien, ki hien, ly hien
hien so » khien so, bien so, hieu so

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 lang van ((hieu soat) or (hieu suat)) ) or ( minh thong quan li hien so ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung lang van ((hieu soat) OR (hieu suat)) ) OR ( minh thong quan li hien so )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung lang van ((hieu soat) or (hieu suat)) ) or ( minh thong quan li hien so ))*.