Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
canh huong » anh huong, canh duong, manh huong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh luc » tranh luan, tranh cuoc, tranh duoc
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: hoc ((thieu xanh) OR (hieu manh)) - canh tranh luc canh huong ((dan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh tranh luc canh huong ((dan toan) OR (dan than)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - canh tranh luc canh huong ((dan toan) or (dan than)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - canh tranh luc canh huong ((dan toan) or (dan than)) tap*.