Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
canh trinh » canh tranh, hanh trinh, canh tinh
doi chieu » doc hieu, doi chi, ho chieu
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong dong, cong tac
cong tan » cong tac, cong san, cong thanh
ca tu » ca tru, cau tu, ca thu

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: doi chieu sang - canh trinh va nhung ((((cong dan) OR (huong dan))) OR (cong tan)) ca tu~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - canh trinh va nhung ((((cong dan) or (huong dan))) or (cong tan)) ca tu*.