Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
thong luan » thong quan, tong luan, thong xuan
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
chat cao » chat cho, chat bao, chat cam
chat co » thuat co, chat cua, chat deo

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 ((chieu xanh) OR (chinh sach)) - canh trinh va thong thong luan ((chat cao) OR (chat co))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chinh sach)) - canh trinh va thong thong luan ((chat cao) OR (chat co))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chinh sach)) - canh trinh va thong thong luan ((chat cao) OR (chat co))*.