Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » tong cong, thong thong, phong chong
doi chieu » doc hieu, doi chi, ho chieu
tranh va » tranh van, trang va, trinh va
tan toan » tan tran, tap toan, van toan
toan cau » 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: ((doi chieu) or (theo chieu)) xanh - hanh tranh va ((thong cong) OR (trong cong)) tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) xanh - hanh tranh va ((thong cong) OR (trong cong)) tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) xanh - hanh tranh va ((thong cong) OR (trong cong)) tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) xanh - hanh tranh va ((thong cong) OR (trong cong)) tan toan cau*.