Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
cua thuong » cua truong, cua phuong, ca thuong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
hoc hieu » hoc thieu, hoc hien, doc hieu
cong san » cong tac
han dau » hang dau, phan dau, van dau
doan » doanh, dan, toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh tranh cua thuong cong san ((han dau) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh tranh cua thuong cong san ((han dau) OR (chan doan)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh tranh cua thuong cong san ((han dau) or (chan doan))*.