Perhaps you should try some spelling variations:
chinh huong » chinh phuong, chinh truong, dinh huong
tranh luan » trinh luan, trinh luat, doanh luan
nhieu tang » chieu sang, nhiet nang
luan chinh » luan chi, hoan chinh, luat hinh
hieu lang » chieu sang, hieu quang, hieu van
dan than » dan chan, ban than, van than

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: hoi ((hieu lang) OR (nhieu tang)) - canh tranh luan chinh huong ((xuan toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi ((hieu lang) OR (nhieu tang)) - canh tranh luan chinh huong ((xuan toan) or (dan than)) cau~".
• Adding a wildcard symbol may retrieve word variants: hoi ((hieu lang) OR (nhieu tang)) - canh tranh luan chinh huong ((xuan toan) or (dan than)) cau*.