Perhaps you should try some spelling variations:
credit training » credit trading, credit rationing, credit rating
training volume » trading volume, trading volumes, planning volume
volume zone » volume one, volume notes
wang yong » wang yang, wang hyoung, wang yan
zone shu » zone ch, zone sez
dong » doing, long, done

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong sin) or (wang yong)) a rural credit training volume zone shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong sin) OR (wang yong)) a rural credit training volume zone shu ;*.