Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
luan quang » luat quang, quan quang, xuan quang
quang cong » quang cuong, quang dong, quang hoang
hien tach » thien hach, chiet tach, vien bach
dong toan » bong toan, cong toan, dang toan
dung toan » dung doanh, dung thang, dung thanh

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: "hoc hien tach - canh trinh luan quang cong ((dong toan) OR (dung toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - canh trinh luan quang cong ((dong toan) OR (dung toan)) cao*.