Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
san doanh » van doanh, toan doanh, vay doanh
doanh cua » doanh luan
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong san » cong tac

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 - manh ((trung va) or (trung ha)) dung cong san doanh cua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - manh ((trung va) OR (trung ha)) dung cong san doanh cua.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - manh ((trung va) or (trung ha)) dung cong san doanh cua*.