Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
canh doanh » hanh doanh, chinh doanh, doanh doanh
phong dieu » thong dieu, nhung dieu, trong dieu
hoc thieu » toc thieu, hoc hien
vat dung » van dung, viet dung, mat duong
cong van » cong vang, song van, cong tan
cong san » cong tac
va dung » van dung, va duong, va ung

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 - canh doanh ((va dung) OR (vat dung)) ((cong van) or (cong san)) phong dieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - canh doanh ((va dung) OR (vat dung)) ((cong van) OR (cong san)) phong dieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - canh doanh ((va dung) OR (vat dung)) ((cong van) or (cong san)) phong dieu".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - canh doanh ((va dung) OR (vat dung)) ((cong van) or (cong san)) phong dieu*.