Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
trung cap » trung tam
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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: toc thieu sang - thanh ((trung cap) OR (truong cao)) nhung cong dan ((than cau) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - thanh ((trung cap) or (truong cao)) nhung cong dan ((than cau) OR (than cap))~".
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh ((trung cap) or (truong cao)) nhung cong dan ((than cau) OR (than cap))*.