Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh trinh » canh tranh, hanh trinh, canh tinh
viet tach » viet sach, viet tech, viet thanh
vat nhung » va nhung, vap nhung, vai nhung
doi viet » dai viet, hoi viet, oi viet
dan phan » doan phan, van phan, dam phan
dan chan » dan gian, dan ca, van chat

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 trinh) or (hanh chinh)) vat nhung cong ((dan phan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi viet tach - ((canh trinh) OR (hanh chinh)) vat nhung cong ((dan phan) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: doi viet tach - ((canh trinh) or (hanh chinh)) vat nhung cong ((dan phan) or (dan chan)) cau*.