Perhaps you should try some spelling variations:
trinh thong » trinh thuong, trinh trong, trinh tong
dinh thong » dinh thuong, dinh hong, dinh trong
thong dung » thong cong, thong thuong
hieu soat » hieu suat, hieu hoat, hieu luat
van chien » van hien, van tien
dung ban » dung san, dung dan, dong ban
ban hieu » gian hieu, phan hieu, luan hieu
van hieu » cao hieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( dinh thong dung ban hieu soat ) OR ( trinh thong quan ((van chien) OR (van hieu)) soat ))~.
• Adding a wildcard symbol may retrieve word variants: (( dinh thong dung ban hieu soat ) or ( trinh thong quan ((van chien) or (van hieu)) soat ))*.