Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
canh doanh » hanh doanh, chinh doanh, doanh doanh
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
dung cong » dung trong
hang cong » dang cong, hang nong, bang cong
thanh cac » hanh cac, thanh bac, thanh ca
doi hieu » doi chieu, doc hieu, doi hien

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

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