Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cong » thong cong, khong cang, chong cong
trung ha » trung hoc, trung tam, trung cap
ha khong » hoa khong, hay khong, hua khong
tan chan » ban chan, can chan, tam chan
dan chan » dan gian, dan ca, van chat
co hieu » doc hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co hieu) OR (cao hieu)) tinh - thanh trung ha khong cong ((tan chan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co hieu) OR (cao hieu)) tinh - thanh trung ha khong cong ((tan chan) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co hieu) OR (cao hieu)) tinh - thanh trung ha khong cong ((tan chan) or (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((co hieu) OR (cao hieu)) tinh - thanh trung ha khong cong ((tan chan) or (dan chan)) cau*.