Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh tran » thanh trang, thanh toan, thanh tra
duong cong » dung cong, luong cong, duong trong
dong cong » dung cong, dang cong, cong cong
ban thanh » ban hanh, ban hang
thanh cau » thanh chau, thanh mau, nhanh cau

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 xanh) OR (chieu xanh)) - thanh tran quang ((dong cong) or (duong cong)) ban thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - thanh tran quang ((dong cong) OR (duong cong)) ban thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - thanh tran quang ((dong cong) or (duong cong)) ban thanh cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - thanh tran quang ((dong cong) or (duong cong)) ban thanh cau*.