Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
dong doanh » trong doanh, doanh doanh, dong thanh
dung doanh » dung dan, dung dong
hieu lang » hieu quang, nhieu tang, hieu van
ranh mach » trinh mach, tinh mach, ban mach
ca thuong » cao thuong, cua thuong, va thuong
thanh tu » hanh tu, nhanh tu, thanh tung
mach ca » mach cua, mach cam, mach cao

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)) - ranh mach ca thuong ((dong doanh) or (dung doanh)) thanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (hieu lang)) - ranh mach ca thuong ((dong doanh) OR (dung doanh)) thanh tu.
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (hieu lang)) - ranh mach ca thuong ((dong doanh) or (dung doanh)) thanh tu*.