Perhaps you should try some spelling variations:
chien chong » thien cong
thieu sang » chieu sang, thieu khang, thieu quang
canh doanh » hanh doanh, chinh doanh, doanh doanh
cua tong » cua cong, cua dong, cua song
cua nong » cua cong, cuu nong, cua dong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap

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