Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
canh sinh » canh tinh, canh binh, tinh sinh
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, hoc thieu, mot chieu
sinh van » sinh vat, dinh van, sinh va
van hang » van khang, van hoang, van thang
cong san » cong tac
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van

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

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