Perhaps you should try some spelling variations:
ngung cong » nhung cong, dung cong, nganh cong
manh tinh » man tinh, manh binh, canh tinh
cong manh » cong danh, duong manh, cong thanh
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 (toc thieu)) xanh - manh tinh chat ngung cong manh ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (toc thieu)) xanh - manh tinh chat ngung cong manh ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (toc thieu)) xanh - manh tinh chat ngung cong manh ((toan cau) OR (toan cao))*.