Perhaps you should try some spelling variations:
human gender » bhutan gender, german gender, human genome
human gene » human genome, human bone, human genetic
sheng jie » shang jin, sheng jou, sheng qi
hua gene » a gene, hua ren, hy5 gene
jie song » jae song, jin song, kim song
song shu » cong shu, song shin, tong shui
yan yan » yan yuan, nan yan, yang yang
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 (((human gene) or (human gender)))) sheng jie song shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yan ((hua gene) OR (((human gene) OR (human gender)))) sheng jie song shu ;.
• Adding a wildcard symbol may retrieve word variants: wang yan yan ((hua gene) or (((human gene) or (human gender)))) sheng jie song shu ;*.