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
hoc thieu » toc thieu, hoc hien
trung cap » trung tam
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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: hoc thieu sang - thanh ((trung cap) OR (truong cao)) nhung cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trung cap) or (truong cao)) nhung cong dan than cau*.