Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
truong cao » truong dai
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
trung ha » trung hoc, trung tam, trung cap
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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 ha) or (truong cao)) dung cong tan ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh ((trung ha) OR (truong cao)) dung cong tan ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh ((trung ha) or (truong cao)) dung cong tan ((toan tap) or (toan ban))*.