Perhaps you should try some spelling variations:
yuan wang » yuan kang, yuan chang, yu wang
qian wang » yiqian wang, qian rong, qian yan
gene yang » gene bank
yan wang » yang yang, yan liang, yan zhang
yang tin » yang jin, yang lin, yang jing
hong shu » tong shui, wong shiu, hong seo
a gene » a genre, a gender, a gentle
two a » two _

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: ((((yuan wang) OR (yan wang))) OR (qian wang)) two a gene yang tin ((hong shu) OR (cong shu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yuan wang) OR (yan wang))) or (qian wang)) two a gene yang tin ((hong shu) or (cong shu)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((((yuan wang) OR (yan wang))) or (qian wang)) two a gene yang tin ((hong shu) or (cong shu)) ;*.