Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, anh trinh
canh tinh » hanh tinh, manh tinh, canh tranh
dung cong » dung trong
ban nhanh » ban hanh, ban thanh, ban nhan
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong san, cong tan
nhanh ha » thanh hoa, thanh hai, khanh hoa
ho hieu » hoi hieu, nho hieu, co hieu
va dung » van dung, va duong, vat dung

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: ((ho hieu) OR (ho chieu)) quang - ((canh trinh) OR (canh tinh)) va dung cong ban nhanh ha~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) OR (ho chieu)) quang - ((canh trinh) or (canh tinh)) va dung cong ban nhanh ha~".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) OR (ho chieu)) quang - ((canh trinh) or (canh tinh)) va dung cong ban nhanh ha*.