Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
cua phuong » cuu phuong, cuc phuong, luan phuong
tranh cua » doanh cua, manh cua
tich toan » tinh toan, tich than, trinh toan
hach toan » thanh toan, manh toan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - canh tranh cua phuong cong ((tich toan) OR (hach toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - canh tranh cua phuong cong ((tich toan) or (hach toan)) cau*.