Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
hoang nhan » hoang nham, hoang thanh, hoang van
trinh vat » trinh van, trinh luat, sinh vat
bang song » nang song
doan nhan » doanh nhan, doan phan, doan chuan
ho chieu » theo chieu, hoc thieu, doi chieu

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 - canh trinh vat ((nhung cong) or (bang song)) ((doan nhan) OR (hoang nhan)) cach~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh trinh vat ((nhung cong) OR (bang song)) ((doan nhan) OR (hoang nhan)) cach.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh trinh vat ((nhung cong) or (bang song)) ((doan nhan) OR (hoang nhan)) cach".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trinh vat ((nhung cong) or (bang song)) ((doan nhan) OR (hoang nhan)) cach*.