Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cua thuong » cua truong, cua phuong, ca thuong
hoc thieu » toc thieu, hoc hien
hanh mang » nhanh mang, hanh trang, nhanh lang
quang cao » nang cao, quang nam
cong tan » cong tac, cong san, cong thanh
quan cap » quan cau, quan lap, quan phap

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 mang ((cua thuong) or (va thuong)) cong tan ((quan cap) OR (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh mang ((cua thuong) OR (va thuong)) cong tan ((quan cap) OR (quang cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh mang ((cua thuong) or (va thuong)) cong tan ((quan cap) OR (quang cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh mang ((cua thuong) or (va thuong)) cong tan ((quan cap) OR (quang cao))*.