Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
hanh tranh » canh tranh, hanh trinh, hanh trang
luan trong » quan trong, luat trong, luan tuong
hoc chieu » hoc thieu, ho chieu, hoc dieu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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) or (hoc hien)) xanh - hanh tranh luan trong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc hien)) xanh - hanh tranh luan trong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc hien)) xanh - hanh tranh luan trong cong dan toan cao*.