Perhaps you should try some spelling variations:
credit training » credit rationing, credit rating, credit granting
credit trading » credit rating, credit standing, credit creating
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling
case hong » care hong, case how
hong shu » cong shu, tong shui, wong shiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong yang) or (wang yang)) yao du ((credit trading) OR (credit training)) case hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong yang) OR (wang yang)) yao du ((credit trading) OR (credit training)) case hong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (wang yang)) yao du ((credit trading) OR (credit training)) case hong shu ;*".