Perhaps you should try some spelling variations:
young john » kong john, wong john, young jean
wang wang » wang yang, wang liang, wang yan
yang john » king john, yang jin, yang jun
song same » non same, song pae, wong sam
yong hua » dong hua, wang hua, tong hui
ying hua » ming hua, wang hua, ying zhu

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 wang ((yong hua) OR (ying hua)) gene ((yang john) OR (young john)) song same ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang ((yong hua) or (ying hua)) gene ((yang john) OR (young john)) song same ;~".
• Adding a wildcard symbol may retrieve word variants: wang wang ((yong hua) or (ying hua)) gene ((yang john) OR (young john)) song same ;*.