Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
sheng jin » shang jin, sheng jou, sheng qi
hua gene » hua ren, hy5 gene
jin song » jie song, john song, kim song
song shu » cong shu, song shin, tong shui
yan yan » yan yuan, nan yan, yang yang
a gene » a genre, a gender, a gentle
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan yan ((((hua gene) OR (a gene))) or (human gene)) sheng jin song shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yan ((((hua gene) OR (a gene))) OR (human gene)) sheng jin song shu ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yan yan ((((hua gene) OR (a gene))) or (human gene)) sheng jin song shu ;".
• Adding a wildcard symbol may retrieve word variants: wang yan yan ((((hua gene) OR (a gene))) or (human gene)) sheng jin song shu ;*.