Perhaps you should try some spelling variations:
tranh luan » trinh luan, trinh luat, doanh luan
thuong dan » huong dan, thuong dam, thuong lan
thuong han » thuong mai, thuong va, thuong gap
luan nang » luan van, van nang, luan san
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
toan tap » toan ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu xanh - canh tranh luan nang ((thuong dan) OR (thuong han)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - canh tranh luan nang ((thuong dan) OR (thuong han)) toan tap*.