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
toan cau » toan cao, toan ban, toan tap
va dang » van dang, va nang, va lang

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 sang - canh trinh va dang ((((cong dan) OR (huong dan))) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - canh trinh va dang ((((cong dan) OR (huong dan))) OR (cong tan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - canh trinh va dang ((((cong dan) OR (huong dan))) or (cong tan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - canh trinh va dang ((((cong dan) OR (huong dan))) or (cong tan)) toan cau*.