Perhaps you should try some spelling variations:
ping wang » ping pong, hong wang
kong sara » kong sar
hua gene » human gene, a gene, hua ren
yang jun » yang jui, pang jun, yang jin
ying jin » yang jin, jing ji
yang jie » yang jin, yang di, yang jui
yan hua » tan hua, ya hua, wang hua

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: ping wang yan hua gene ((yang jun) OR (((ying jin) OR (yang jie)))) kong sara ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ping wang yan hua gene ((yang jun) or (((ying jin) OR (yang jie)))) kong sara ;~".
• Adding a wildcard symbol may retrieve word variants: ping wang yan hua gene ((yang jun) or (((ying jin) OR (yang jie)))) kong sara ;*.