Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
tranh cua » doanh cua, manh cua
dung doan » dung doanh, dung dan, dong doanh
dung toan » dung doanh, dung thang, dung thanh
phan dau » phan tu, hang dau
cua ung » cua rung, cua ong, cua nhung

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 sach) or (chieu sang)) - canh tranh cua ung ((dung doan) OR (dung toan)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - canh tranh cua ung ((dung doan) OR (dung toan)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - canh tranh cua ung ((dung doan) OR (dung toan)) phan dau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - canh tranh cua ung ((dung doan) OR (dung toan)) phan dau*.