Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tran xuan » tran quang, tran van
dan than » dan chan, ban than, dan toan
van than » van thanh, van thang, van tuan
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 - thanh ((tran xuan) or (luan van)) nhung cong ((dan than) OR (van than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((tran xuan) OR (luan van)) nhung cong ((dan than) OR (van than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh ((tran xuan) or (luan van)) nhung cong ((dan than) OR (van than)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((tran xuan) or (luan van)) nhung cong ((dan than) OR (van than)) cau*.