Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, phong chong
doi chieu » doi chi, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
dung toan » dung doanh, dung thang, dung thanh
doc hieu » toc thieu, hoc thieu, hoc hien
toan tap » toan ban

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