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 cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

You may be able to get more results by adjusting your search query.

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