Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
cua thuong » cua truong, cua phuong, ca thuong
tranh cua » doanh cua, manh cua
chi xanh » chi anh, chi danh, chi hanh
cong san » cong tac
toan cao » toan tap
toan ban » van ban
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - canh tranh cua thuong cong san ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh tranh cua thuong cong san ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - canh tranh cua thuong cong san ((toan cao) or (toan ban))*.