Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
dong thanh » truong thanh
doi chieu » doc hieu, doi chi, ho chieu
cong danh » cuong danh, cong dan, cong thanh
trung ha » trung hoc, trung tam, trung cap
ha cong » hoa cong, va cong, ha dong

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 cong ((cong danh) or (dong thanh)) quang nam~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung ha cong ((cong danh) OR (dong thanh)) quang nam.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung ha cong ((cong danh) or (dong thanh)) quang nam*.