Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
sheng john » chen john, sheng jou
yang yang » wang yang, wang yan
john song » john wong, john bonn, john ngosong
yong yan » dong yang, ying yang, yong yoon
hua gene » a gene, hua ren, hy5 gene
song shu » cong shu, song shin, tong shui

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

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