Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
manh tung » manh hung, thanh tung
tung tuan » trung tuan, hung tuan, quang tuan
tuan ban » tuan bang, toan ban, luan ban
ban cong » bang cong, van cong, phan cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap

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: theo ((dieu hanh) OR (hieu lang)) - manh tung tuan ban cong tac toan cao~.
• Adding a wildcard symbol may retrieve word variants: theo ((dieu hanh) or (hieu lang)) - manh tung tuan ban cong tac toan cao*.