Perhaps you should try some spelling variations:
young john » kong john, wong john, young jean
wang wang » wang yang, wang liang, wang yong
yang john » king john, yang jin, yang jun
song same » non same, song pae, wong sam
yong hua » dong hua, ying hua, wang hua
hua gene » human gene, a gene, hua ren

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