Perhaps you should try some spelling variations:
credit obtaining » credit training, product obtaining, credit rationing
obtaining value » retaining valued, sustaining value, organizing value
value change » value exchange, valence change, value chapter
dual credit » rural credit, deals credit, equal credit
change shu » change saul, change sea, change six
yang yang » wang yang, wang yan
a dual » _ dual

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: (((dong OR doing) sin) OR (yang yang)) a dual credit obtaining value change shu ;~.
• Adding a wildcard symbol may retrieve word variants: (((dong or doing) sin) or (yang yang)) a dual credit obtaining value change shu ;*.