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 van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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