Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
dung cong » dung trong
cong than » cong thanh, cong thang, cong tan
thi doan » thai doan, thi hoan, thi loan
doan van » doan va, hoang van, luan van
van dung » van dong, xay dung, tin dung
phan van » pham van, thanh van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thi doan van dung cong than ((phan tu) OR (phan van))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thieu sang - thi doan van dung cong than ((phan tu) OR (phan van))*".