Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
thanh lap » thanh san, phan lap, thanh hai
cong tan » cong san, cong thanh, cong ty
cong tac » cong ty
tung va » trung va, tuong va, dung va
va hang » van hang, va nang, va lang

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 tung va hang ((cong tan) or (cong tac)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung va hang ((cong tan) OR (cong tac)) thanh lap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tung va hang ((cong tan) or (cong tac)) thanh lap*.