Perhaps you should try some spelling variations:
training risk » trading risk, training crisis, defining risk
training cost » training costs, training course, training courses
dual credit » rural credit, deals credit, equal credit
wang yang » wang yan, wang yanling
y dual » _ dual, a dual, 3 dual
kong » long, hong, pong
sar » sara, star, saur

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (wang liang)) y dual credit ((training risk) OR (training cost)) kong sar ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang liang)) y dual credit ((training risk) or (training cost)) kong sar ;*.