Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
canh sinh » canh tinh, canh binh, tinh sinh
hang cong » dang cong, hang nong, bang cong
doan phan » doanh phan, toan phan, doanh nhan
vat hang » van hang, dat hang, va hang
dan phan » dan chan, van phan, dam phan

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