Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thinh doan » chinh doanh, hinh toan, thi doan
dang cong » dung cong
cong than » cong thanh, cong thang, cong tan
doan van » doan va, hoang van, luan van
van dang » van dong, van dung, van nang
phan lap » phan dau

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - thinh doan van dang cong than ((phan tu) OR (phan lap))~".
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thinh doan van dang cong than ((phan tu) OR (phan lap))*.