Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
nhung cong » dung cong, thong cong, nhung don
canh doanh » hanh doanh, chinh doanh, doanh doanh
hieu sang » chieu sang, hieu lang, hieu quang
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
thanh cac » hanh cac, thanh bac, thanh ca
doc hieu » toc thieu, hoc thieu, hoc hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - canh doanh cua ((nhung cong) or (hang cong)) ngang thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - canh doanh cua ((nhung cong) OR (hang cong)) ngang thanh cac.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - canh doanh cua ((nhung cong) or (hang cong)) ngang thanh cac*.