Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, dieu hanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hieu nganh)) - canh tranh cua thong cong ((dan toan) or (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - canh tranh cua thong cong ((dan toan) OR (dan than)) cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu nganh)) - canh tranh cua thong cong ((dan toan) or (dan than)) cau*.