Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » hoc thieu, doi chieu, mot chieu
tranh va » tranh van, trang va, trinh va
va thong » va thuong, va phuong, he thong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan ban » van ban

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

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