Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cua truong » cua trung, xuan truong, cac truong
hoc thieu » toc thieu, hoc hien
cach dung » sach dung, cach mang, tac dung
dung cua » dung luan, dung cho
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan tap » toan tap, tuan tai, tuyen 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 - cach dung cua truong ((cong van) or (cong san)) tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - cach dung cua truong ((cong van) OR (cong san)) tuan tap*.