Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
chau tinh » cuu tinh, ha tinh, cua tinh
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
san toan » van toan, manh toan, xuan toan
dan toan » van toan, dan than, manh toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chau tinh)) - canh tranh cua hang cong ((san toan) OR (dan toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chau tinh)) - canh tranh cua hang cong ((san toan) OR (dan toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chau tinh)) - canh tranh cua hang cong ((san toan) OR (dan toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chau tinh)) - canh tranh cua hang cong ((san toan) OR (dan toan)) cao*.