Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
nong cong » cong cong, tong cong, nang cong
chinh bao » chinh ban, chinh giao, chinh tai
tam nong » lam nong, tam duong, tam huong
cong tac » cong ty
chan cau » phan cau, can cau, chinh cau
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu quang - thanh trung tam nong cong tac ((chan cau) or (chinh bao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu quang - thanh trung tam nong cong tac ((chan cau) OR (chinh bao)).
• Adding a wildcard symbol may retrieve word variants: ho hieu quang - thanh trung tam nong cong tac ((chan cau) or (chinh bao))*.