Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh tranh cua cong ((cong dan) or (((cong thanh) or (cong san)))) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh tranh cua cong ((cong dan) OR (((cong thanh) OR (cong san)))) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh tranh cua cong ((cong dan) or (((cong thanh) or (cong san)))) toan cao*.