Perhaps you should try some spelling variations:
training course » training courses
rural credits » rural credit, total credits
training a » training _, training 4, training data
wang yang » wang yan, wang liang, wang yanling
hong shu » tong shui, wong shiu, hong seo
4 rural » a rural, 2 rural
yang 4 » yang 47, yang _, yang 8

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 4 rural credits ((training a) or (training course)) ((hong shu) OR (cong shu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang 4 rural credits ((training a) OR (training course)) ((hong shu) OR (cong shu)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang 4 rural credits ((training a) or (training course)) ((hong shu) OR (cong shu)) ;*".