Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
gene yang » gene bank
yang hua » wang hua, yang hui, ying hua
hua gene » human gene, a gene, hua ren
kim song » kim young, kim eung
li song » li cong, li rong, jie song

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yang hua gene yang ((li song) or (kim song)) ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yang hua gene yang ((li song) OR (kim song)) ghi ;.
• Adding a wildcard symbol may retrieve word variants: wang yang yang hua gene yang ((li song) or (kim song)) ghi ;*.