Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cap » khan cap, thanh lap, thanh cac
va cong » tai cong, cua cong

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 - anh huong ((va cong) or (va phuong)) cong tan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - anh huong ((va cong) OR (va phuong)) cong tan than cap*.