Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
trung dap » trung cap, trung dai, trung dam
ban thanh » ban hanh, ban hang
ung cong » dung cong, luong cong, duong cong
dan than » dan chan, ban than, van than

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: hoc ((thieu xanh) OR (thien anh)) - thanh trung dap ung cong ((dan than) OR (ban thanh)) cao~.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien anh)) - thanh trung dap ung cong ((dan than) or (ban thanh)) cao*.