Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
dan toan » van toan, dan than, manh toan
dan chan » dan gian, dan ca, van chat

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

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