Perhaps you should try some spelling variations:
learning theory » learning through
wang learning » long learning, change learning, making learning
theory hua » theory human, theory how, theory 4a
yang jie » yang di, yang xi, yang yi
yang jin » yang jun, ying jin, shang jin
yang jui » yang judy, yang di, yang xi
hua li » bohua li

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: wang learning theory hua li ((((yang jie) OR (yang jin))) OR (yang jui)) kong (sar OR star) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang learning theory hua li ((((yang jie) OR (yang jin))) or (yang jui)) kong (sar or star) ;~".
• Adding a wildcard symbol may retrieve word variants: wang learning theory hua li ((((yang jie) OR (yang jin))) or (yang jui)) kong (sar or star) ;*.