Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
canh doanh » hanh doanh, chinh doanh, doanh doanh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
cua nhung » va nhung
tan van » tran van, tang van, luan van
dao van » dang van
do van » vo van, so 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 cua nhung cong ((tan van) or (((dao van) OR (do van)))) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - canh doanh cua nhung cong ((tan van) OR (((dao van) OR (do van)))) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - canh doanh cua nhung cong ((tan van) or (((dao van) OR (do van)))) ban".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - canh doanh cua nhung cong ((tan van) or (((dao van) OR (do van)))) ban*.