Perhaps you should try some spelling variations:
trung thanh » truong thanh
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
trung quan » truong quan, trong quan, trung tuan
dung cong » dung trong
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 (chieu xanh)) - thanh ((trung quan) or (trung thanh)) dung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu xanh)) - thanh ((trung quan) OR (trung thanh)) dung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (chieu xanh)) - thanh ((trung quan) or (trung thanh)) dung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (chieu xanh)) - thanh ((trung quan) or (trung thanh)) dung cong san toan cau*.