Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
va phuong » va thuong, cac phuong
va thong » va thuong, he thong, va cong
cong san » cong tac
san chan » san chang, dan chan, san chay
chan cau » phan cau, can cau, chinh cau

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

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