Perhaps you should try some spelling variations:
ncanh tranh » nhanh thanh, can tranh, nganh thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
song cong » cong cong, tong cong, song hong
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
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: theo chieu xanh - ((canh tranh) or (ncanh tranh)) qua song cong dan ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - ((canh tranh) OR (ncanh tranh)) qua song cong dan ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - ((canh tranh) or (ncanh tranh)) qua song cong dan ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - ((canh tranh) or (ncanh tranh)) qua song cong dan ((than cau) OR (toan cau))*.