Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
toc hieu » toc thieu, doc hieu, hoc thieu
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, khoan cam
toan ban » van ban

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: toc hieu manh - hanh tranh cua dung ((cong dan) OR (cong tan)) ((khan cap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: toc hieu manh - hanh tranh cua dung ((cong dan) or (cong tan)) ((khan cap) or (toan ban))*.