Perhaps you should try some spelling variations:
thieu khang » chieu khong
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thanh nhau » thanh nhan, thanh chau, thanh hai
trung cua » truong cua, trung tuan, trung cap
dong cong » duong cong, dung cong, dang cong
thanh nha » thanh nhan, thanh ha, thanh nga
cua dong » chua dong, cua cong, cua dang
cong tac » cong ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu khang) or (thieu quang)) - thanh trung cua dong cong tac ((thanh nhau) or (thanh nha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu khang) OR (thieu quang)) - thanh trung cua dong cong tac ((thanh nhau) OR (thanh nha)).
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu khang) or (thieu quang)) - thanh trung cua dong cong tac ((thanh nhau) or (thanh nha))*.