Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trang, lanh tranh
hanh trinh » canh tranh, hanh chinh
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
qua trong » quan trong, qua trinh, qua song
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) OR (hien hanh)) - ((hanh tranh) or (hanh trinh)) qua trong cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - ((hanh tranh) OR (hanh trinh)) qua trong cong san toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - ((hanh tranh) or (hanh trinh)) qua trong cong san toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - ((hanh tranh) or (hanh trinh)) qua trong cong san toan tap*.