Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
chieu sang » chieu sach, chieu xanh, nhieu tang
nhan thong » nha thong, nhan khong, nhan tong
nhan trong » nhuan trong, nhat trong, nhin trong
hieu lang » hieu quang, nhieu tang, hieu van
cong ban » cong bang, cong san, cong tan
ban hang » ngan hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (hieu lang)) - doanh doanh ((nhan thong) OR (nhan trong)) cong ban hang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - doanh doanh ((nhan thong) OR (nhan trong)) cong ban hang va.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (hieu lang)) - doanh doanh ((nhan thong) OR (nhan trong)) cong ban hang va".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - doanh doanh ((nhan thong) OR (nhan trong)) cong ban hang va*.