Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh cac » trinh cac, thanh cac, tranh cai
tranh ca » tranh cua, tranh cai, thanh ca
cong san » cong tac
toan tap » toan ban
toan cao » toan 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 - canh ((tranh ca) OR (tranh cac)) thuong cong san ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - canh ((tranh ca) OR (tranh cac)) thuong cong san ((toan tap) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu xanh - canh ((tranh ca) OR (tranh cac)) thuong cong san ((toan tap) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo chieu xanh - canh ((tranh ca) OR (tranh cac)) thuong cong san ((toan tap) or (toan cao))*.