Perhaps you should try some spelling variations:
zhang ming » zhang xin
wang wang » wang liang, wang yan, wang yong
wang yang » wang yan, wang liang, wang yanling
chang min » chang mae, chan ming, chang ann
yang hua » wang hua, yang hui, ying hua
hua gene » human gene, a gene, hua ren
hong ng » hong kong, hong jong, hong hong
hong g » hong w, hong 7, hong a

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 yang hua gene ((((chang min) OR (zhang ming))) OR (tang li)) ((hong g) OR (hong ng)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang yang hua gene ((((chang min) or (zhang ming))) or (tang li)) ((hong g) OR (hong ng)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang wang yang hua gene ((((chang min) or (zhang ming))) or (tang li)) ((hong g) OR (hong ng)) ;*.