Perhaps you should try some spelling variations:
chiet tach » chieu sach
canh trinh » canh tranh, hanh trinh, canh tinh
doi chiet » doi chieu, doi chi, doi viet
trinh vat » trinh van, trinh luat, sinh vat
vat nhung » va nhung, vap nhung, vai nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
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: doi chiet tach - canh trinh vat nhung ((cong dan) or (cong san)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - canh trinh vat nhung ((cong dan) OR (cong san)) phan cac.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - canh trinh vat nhung ((cong dan) or (cong san)) phan cac*.