Perhaps you should try some spelling variations:
truong trung » tieng trung
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong ban » cong bang, cong san, cong tan
ban hang » ngan hang
hang cac » hang ca, hang cau, bang cac

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 ((truong thpt) or (truong trung)) nhung cong ban hang cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((truong thpt) OR (truong trung)) nhung cong ban hang cac.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((truong thpt) or (truong trung)) nhung cong ban hang cac*.