Perhaps you should try some spelling variations:
thanh thang » nhanh thang, thanh thanh, thanh hang
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
ban thanh » ban hanh, ban hang

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