Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
tranh luan » trinh luan, trinh luat, doanh luan
hoc thien » hoc hien, hoc thieu, hoc thiet
luan hung » luan chung, lan hung, luan ung
cong manh » cong danh, duong manh, cong thanh
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - canh tranh luan hung ((cong manh) OR (cong trinh)) ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - canh tranh luan hung ((cong manh) or (cong trinh)) ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - canh tranh luan hung ((cong manh) or (cong trinh)) ((toan cau) OR (toan cao))*.