Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
tung cao » nung cao, truong cao, trung cap
ung cong » dung cong, luong cong, duong cong
cong san » cong tac
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban
cao ung » cao dung, cac ung, cho ung

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