Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
manh toan » thanh toan, anh tuan, tinh toan
cua hang » cua dang, cua nhung, cua cong
dan toan » van toan, dan than, xuan toan

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

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