Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chieu » theo tieu, ho chieu, theo chu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
theo yeu » theo tieu, thiet yeu, theo chu
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: ((theo chieu) or (theo yeu)) sach - canh tranh cua nhung cong ((dan toan) OR (dan than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo yeu)) sach - canh tranh cua nhung cong ((dan toan) OR (dan than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo yeu)) sach - canh tranh cua nhung cong ((dan toan) OR (dan than)) cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo yeu)) sach - canh tranh cua nhung cong ((dan toan) OR (dan than)) cau*.