Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
canh sinh » canh tinh, canh binh, tinh sinh
dung cong » dung trong
theo chu » theo chieu, cho chu, chao chu
vat dung » van dung, va dung, viet dung
cong dan » cong san, cong tan, huong dan
phan dau » phan tu
hang dau » hang va, hang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo chu)) xanh - canh sinh vat dung cong dan ((phan dau) or (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chu)) xanh - canh sinh vat dung cong dan ((phan dau) OR (hang dau)).
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chu)) xanh - canh sinh vat dung cong dan ((phan dau) or (hang dau))*.