Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh trang » thanh trung, canh tranh, hanh trinh
dong doanh » dung doanh, trong doanh, doanh doanh
hoc thieu » toc thieu, hoc hien
cong doan » cong dan, cong hoan, cong san
trang va » tran van, hang va
va tong » va thong, va tuong, va trong

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 - hanh trang va tong ((cong doan) OR (dong doanh)) van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh trang va tong ((cong doan) OR (dong doanh)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh trang va tong ((cong doan) OR (dong doanh)) van ban*.