Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
sheng jie » shang jin, sheng jou, sheng qi
lang yan » wang yan, wang yang, zhang yan
hua gene » hua ren, hy5 gene
song shu » cong shu, tong shui, wong shiu
yan yan » yan yuan, nan yan, yang yang
a gene » a genre, a gender, a gentle
shin » skin, sein, thin

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

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