Perhaps you should try some spelling variations:
training cost » training costs, training course, training courses
equal credit » dual credit, equity credit, rural credit
trading risk » trading case, trading room, funding risk
wang yang » wang liang, wang yanling
long shu » cong shu, tong shui, long du
y equal » _ equal, 6 equal, e equals

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (wang yan)) y equal credit ((trading risk) or (training cost)) long shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (wang yan)) y equal credit ((trading risk) OR (training cost)) long shu ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang yan)) y equal credit ((trading risk) or (training cost)) long shu ;*.