Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
theo chieu » theo tieu, ho chieu, theo chu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tap » toan 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: ((theo chieu) OR (doc hieu)) sang - hanh tranh cua nhung ((cong dan) OR (cong san)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (doc hieu)) sang - hanh tranh cua nhung ((cong dan) OR (cong san)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doc hieu)) sang - hanh tranh cua nhung ((cong dan) OR (cong san)) toan tap*.