Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh 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 trung) or (thanh tung)) va nhung cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((thanh trung) OR (thanh tung)) va nhung cong tan than cap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((thanh trung) or (thanh tung)) va nhung cong tan than cap*.