Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
thanh cac » hanh cac, thanh bac, thanh ca
cong dan » cong san, cong tan, cong dong

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: hoc hien nhanh - hanh tranh cua trung ((cong dan) OR (huong dan)) thanh cac~.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh tranh cua trung ((cong dan) or (huong dan)) thanh cac*.