Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
dan toan » van toan, dan than, xuan toan

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 - hanh tranh cua ((nhung cong) OR (hang cong)) ((dan toan) OR (manh toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh tranh cua ((nhung cong) OR (hang cong)) ((dan toan) OR (manh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh tranh cua ((nhung cong) OR (hang cong)) ((dan toan) OR (manh toan)) ban*.