Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu xanh » chieu sach, chieu sang, chieu tinh
quan trong » gian trong
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh tang » anh tang, hanh mang, hanh tung
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 chieu xanh - ((hanh tang) or (hanh trang)) quan trong cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - ((hanh tang) OR (hanh trang)) quan trong cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - ((hanh tang) or (hanh trang)) quan trong cong san toan cau*.