Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
theo chieu » theo tieu, ho chieu, theo chu
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
va phuong » va thuong, cac phuong
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh 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 - canh trinh va phuong cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) xanh - canh trinh va phuong cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) xanh - canh trinh va phuong cong dan toan cau*.