Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
quan trong » gian trong
hien xanh » hien hanh, hien nhanh, chieu xanh
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - ((hanh tranh) or (hanh trinh)) quan trong cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((hanh tranh) OR (hanh trinh)) quan trong cong san toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((hanh tranh) or (hanh trinh)) quan trong cong san toan tap*.