Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
dang thanh » dong thanh, dang hanh, hoang thanh
doi chieu » doi chi, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
thanh cau » thanh chau, thanh mau, nhanh cau
doc hieu » toc thieu, hoc thieu, hoc hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doc hieu)) xanh - hanh tranh cua ((dung cong) OR (dung trong)) dang thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doc hieu)) xanh - hanh tranh cua ((dung cong) OR (dung trong)) dang thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doc hieu)) xanh - hanh tranh cua ((dung cong) OR (dung trong)) dang thanh cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doc hieu)) xanh - hanh tranh cua ((dung cong) OR (dung trong)) dang thanh cau*.