Perhaps you should try some spelling variations:
training costs » trading costs, training courses, training course
training cost » training course, training courses
ida credit » ida credits, a credit, de credit
yang yang » wang yang, wang yan
dong nan » dong yang, dong sin, dong bin
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 nan) or (yang yang)) ya ida credit ((training cost) OR (training costs)) hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (yang yang)) ya ida credit ((training cost) OR (training costs)) hong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong nan) or (yang yang)) ya ida credit ((training cost) OR (training costs)) hong shu ;*".