Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
ca thong » ca thuong, va thong, ca trong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
van chat » cao chat
tung ca » trung ca, tang ca, cung ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh tung ca thong ((cong dan) or (cong tan)) van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung ca thong ((cong dan) OR (cong tan)) van chat.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tung ca thong ((cong dan) or (cong tan)) van chat*.