Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
canh doanh » hanh doanh, chinh doanh, doanh doanh
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
doanh va » doan va, doanh tai, doanh cua
cong van » cong san, song van, cong tan
phan dau » hang dau
va dung » van dung, va duong, vat dung

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