Perhaps you should try some spelling variations:
trinh cong » trinh dung
viet tach » viet sach, viet tech, viet thanh
tranh qua » tranh cua, thanh qua, trinh qua
qua trinh » qua kinh
cong tran » cong tan, cong tuan, cong toan
tran nang » tra nang, tran dang, tran quang
doi viet » dai viet, hoi viet, oi viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi viet tach - canh tranh qua trinh cong tran nang cao~.
• Adding a wildcard symbol may retrieve word variants: doi viet tach - canh tranh qua trinh cong tran nang cao*.