Perhaps you should try some spelling variations:
yang yang » wang yan
wang yang » wang yan, wang liang, wang yanling
hua brain » human brain, a brain, hua ban
yang jie » yang jin, yang di, yang jui
long shu » cong shu, tong shui, long du
yan jiu » yang jin, pang jiu
dong » doing, done, hong

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 sin) OR (((yang yang) OR (wang yang)))) ya hua brain ((yan jiu) OR (yang jie)) long shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong sin) or (((yang yang) or (wang yang)))) ya hua brain ((yan jiu) OR (yang jie)) long shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong sin) or (((yang yang) or (wang yang)))) ya hua brain ((yan jiu) OR (yang jie)) long shu ;*.