Perhaps you should try some spelling variations:
training risk » trading risk, training visit, training work
training cost » training costs, training course, trading costs
yang y.cang » yang yang
dual credit » rural credit, equal credit, rural credits
hong ghi » hong g, hong hai
y dual » _ dual, a dual

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang y.cang y dual credit ((training risk) OR (training cost)) hong ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang y.cang y dual credit ((training risk) OR (training cost)) hong ghi ;*".