Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cang thang » cong thanh, dang thanh
hoc thieu » toc thieu, hoc hien
cong cong » cong dong, trong cong, dung cong
thang va » hang va, trang va, thong va
va cong » tai cong, cua cong
luan » quan, lan

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 - cang thang va cong cong ((doan va) or (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - cang thang va cong cong ((doan va) OR (luan van)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - cang thang va cong cong ((doan va) or (luan van)) ban*.