Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
tinh sinh » tinh ninh, tinh binh, tinh hinh
hang cong » dang cong, hang nong, bang cong
vat hang » van hang, dat hang, va hang
cong san » cong tac
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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 (chinh sach)) - tinh sinh vat hang cong san ((phan cau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chinh sach)) - tinh sinh vat hang cong san ((phan cau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - tinh sinh vat hang cong san ((phan cau) or (phan cac))*.