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
hanh thang » nhanh thang, thanh thang, danh thang
hanh trang » thanh trung, canh tranh, hanh trinh
cong thanh » dong thanh, cong trinh, cong tan
va phuong » va thuong, cac phuong
toan cao » toan tap
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: theo chieu xanh - ((hanh thang) or (hanh trang)) va phuong cong thanh ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((hanh thang) OR (hanh trang)) va phuong cong thanh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((hanh thang) or (hanh trang)) va phuong cong thanh ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((hanh thang) or (hanh trang)) va phuong cong thanh ((toan cao) OR (toan ban))*.