Perhaps you should try some spelling variations:
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
tan long » tan hong, tan kong, tan yong
long seo » hong seo, long ago, long des
yang ka » yang fan, yang yao
ryang d » ryan d, yang d
yan tan » tan tan, yan clan, yan guan

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((yang ka) or (ryang d)) hua gene yan tan long seo ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((yang ka) OR (ryang d)) hua gene yan tan long seo ;.
• Adding a wildcard symbol may retrieve word variants: dong ((yang ka) or (ryang d)) hua gene yan tan long seo ;*.