Perhaps you should try some spelling variations:
nhung xuong » nhung huong, nhung tuong, nhung phuong
hieu sang » chieu sang, hieu lang, hieu quang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » ban than, van than, dan 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: "doc hieu sang - canh tranh cua nhung xuong ((dan than) OR (dan chan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - canh tranh cua nhung xuong ((dan than) OR (dan chan)) cau*.