Perhaps you should try some spelling variations:
dong wang » dong yang, hong wang, dong hoang
yang yang » wang yang, wang yan
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang tan » yang fan, yang dean, liang tan
tan wong » tan hong, tan kong, tan yong
wong yue » wang yue, hong yu

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: ((dong wang) OR (yang yang)) ryanling hua gene yang tan wong yue ;~.
• Adding a wildcard symbol may retrieve word variants: ((dong wang) or (yang yang)) ryanling hua gene yang tan wong yue ;*.