Perhaps you should try some spelling variations:
ngung cong » nhung cong, dung cong, nganh cong
canh tinh » hanh tinh, manh tinh, canh tranh
cong hach » cong sach, cong thanh, cong khanh
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
chat » nhat, phat

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: ((ho chieu) OR (hoc hien)) xanh - canh tinh chat ngung cong hach ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc hien)) xanh - canh tinh chat ngung cong hach ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc hien)) xanh - canh tinh chat ngung cong hach ((toan cau) OR (toan cao))*.