Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
trung hai » trung ha, trung dai, trong hai
hai thong » hai thuong, hai phong, hai trong
cong ban » cong bang, cong san, cong tan
than cap » thanh lap, thanh cac, than cua
khan cap » khoan cam, phan cac, phan cau
khan ap » han ap, khan dam

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 hai thong cong ban ((than cap) or (((khan cap) OR (khan ap))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung hai thong cong ban ((than cap) OR (((khan cap) OR (khan ap)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh trung hai thong cong ban ((than cap) or (((khan cap) OR (khan ap))))".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung hai thong cong ban ((than cap) or (((khan cap) OR (khan ap))))*.