Perhaps you should try some spelling variations:
canh doanh » hanh doanh, chinh doanh, doanh doanh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
nhat hanh » nhat ban, nhat minh
nhan han » nhan chan, nhan dan, nhan van
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - canh doanh ((nhan han) or (nhat hanh)) cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - canh doanh ((nhan han) OR (nhat hanh)) cong dan van ban*.