Perhaps you should try some spelling variations:
training visit » training cost
training test » training cost, training costs, training type
trading case » trading costs, leading cause, trading value
hua credit » dual credit, a credit, ida credit
dong yang » dong hoang, wang yang, yang yang
yang yi » yang di, yang xi, yang jui

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 yi hua credit ((trading case) or (((training visit) OR (training test)))) cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yang yi hua credit ((trading case) OR (((training visit) OR (training test)))) cong shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yang yi hua credit ((trading case) or (((training visit) OR (training test)))) cong shu ;".
• Adding a wildcard symbol may retrieve word variants: dong yang yi hua credit ((trading case) or (((training visit) OR (training test)))) cong shu ;*.