Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
canh sinh » canh tinh, canh binh, tinh sinh
hang cong » dang cong, hang nong, bang cong
doan phan » doanh phan, toan phan, dan phan
van phan » van phong, van thanh, luan phan
sinh va » sinh vat, tinh va, dinh van
va hang » van hang, va nang, va lang

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 xanh)) - canh sinh va hang cong ((van phan) or (doan phan)) dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu xanh)) - canh sinh va hang cong ((van phan) OR (doan phan)) dau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu xanh)) - canh sinh va hang cong ((van phan) or (doan phan)) dau*.