Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
bang cong » dang cong, bang song, hang cong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
cua bang » chua bang, cua ban, cua dang
toan ban » van ban

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 - ((canh tranh) or (thanh trung)) cua bang cong danh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((canh tranh) OR (thanh trung)) cua bang cong danh toan ban*.