Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
chi sach » chinh sach, chieu sach, co sach
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - canh trinh vat nhung ((cong tan) or (cong san)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - canh trinh vat nhung ((cong tan) OR (cong san)) phan cac.
• Adding a wildcard symbol may retrieve word variants: doi chi sach - canh trinh vat nhung ((cong tan) or (cong san)) phan cac*.