Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh dung » thanh duong, thanh tung, thanh hung
cua phuong » cuu phuong, cuc phuong, luan phuong
hoc thieu » toc thieu, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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 dung ((cua thong) OR (cua phuong)) ((cong dan) OR (cong tan)) phan tu~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh dung ((cua thong) or (cua phuong)) ((cong dan) or (cong tan)) phan tu*.