Perhaps you should try some spelling variations:
credits creating » credit creating, credit rating, creation creating
change becoming » china becoming, change coping, change decoupling
change scoping » change coping, change mapping, change helping
dong yang » dong hoang, yang yang, dan yang
wang yang » wang yan, wang liang, wang yanling
3 credits » _ credits, 3 credit, 3.3 credits

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 yang) OR (wang yang)) yaa 3 credits creating ((change becoming) OR (change scoping)) shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) OR (wang yang)) yaa 3 credits creating ((change becoming) or (change scoping)) shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) OR (wang yang)) yaa 3 credits creating ((change becoming) or (change scoping)) shu ;*.