Perhaps you should try some spelling variations:
wei yang's » yiwei wang's
human gene » human genome, human gender, human bone
hua gene » a gene, hua ren, hy5 gene
kang kim » kanaga kim, tan kim, yong kim
kim song » kim young, kim eung
yu chen » yu cheng, yi chen, yulu chen
song yu » song yun, hong yu, rong 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: wei yang's guan ((((hua gene) OR (human gene))) OR (yu chen)) kang kim song yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wei yang's guan ((((hua gene) OR (human gene))) or (yu chen)) kang kim song yu ;~".
• Adding a wildcard symbol may retrieve word variants: wei yang's guan ((((hua gene) OR (human gene))) or (yu chen)) kang kim song yu ;*.