Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
doanh doanh » toan doanh, doanh hoan, doanh thanh
doanh giao » danh gia, anh giao, toan giao
hoc thieu » toc thieu, hoc hien
giao tang » gia tang, giao thong, giao thanh
cong dan » cong san, cong tan, cong dong
than man » than ma, thanh san, tran manh

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 khang - doanh doanh giao tang ((cong dan) OR (huong dan)) than man~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - doanh doanh giao tang ((cong dan) or (huong dan)) than man*.