Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
canh trinh » canh tranh, hanh trinh, canh tinh
cong vang » cong quang, cong ngang, cong san
cong lang » cong luong, cong quang, cong ngang
trinh su » trinh tu, trinh san, trinh cau
hoa mau » hoa may, hoa cau, hoa dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) OR (chiet tach)) - canh trinh su dung ((cong vang) or (cong lang)) hoa mau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - canh trinh su dung ((cong vang) OR (cong lang)) hoa mau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - canh trinh su dung ((cong vang) or (cong lang)) hoa mau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - canh trinh su dung ((cong vang) or (cong lang)) hoa mau*.