Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu sang » chieu sang, thieu quang, hieu lang
canh doanh » hanh doanh, chinh doanh, doanh doanh
cong quang » luong quang, thong quang, duong quang
quang phan » quang chan, quang phat, quang thanh
van dung » van dong, xay dung, tin dung
phan dau » phan tu, hang dau
va dung » va duong, vat dung, 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) or (thieu khang)) - canh doanh ((va dung) OR (van dung)) cong quang phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - canh doanh ((va dung) OR (van dung)) cong quang phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu khang)) - canh doanh ((va dung) OR (van dung)) cong quang phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu khang)) - canh doanh ((va dung) OR (van dung)) cong quang phan dau*.