Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
thieu sang » chieu sang, thieu khang, thieu quang
thong cong » trong cong, tong cong, thong thong
cong than » cong thanh, cong thang, cong tan
doanh va » doan va, doanh tai, doanh cua
va thong » va thuong, va phuong, he thong
phan dau » phan tu, hang dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - chinh doanh va thong cong than ((phan dau) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - chinh doanh va thong cong than ((phan dau) OR (phan lap))*.