Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

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