Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » hieu manh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
trung va » truong va, trang va, trung ha
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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 (thien anh))) or (chieu xanh)) - thanh trung va nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu xanh) OR (thien anh))) OR (chieu xanh)) - thanh trung va nhung cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu xanh) or (thien anh))) or (chieu xanh)) - thanh trung va nhung cong san toan cau*.