Perhaps you should try some spelling variations:
human gender » bhutan gender, human gene, german gender
yuan kang » yuan chang, chan kang, yuan kai
yuan wang » yan wang, yuan chang, qian wang
yao yang » yang yang
gender i » gender im, gender _, gender a
von seo » von see, von seu, von sex
i die » ii die, 2 die, 3 die

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (wan OR lang) ((((yuan kang) OR (yuan wang))) OR (yao yang)) human gender i die von seo ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wan or lang) ((((yuan kang) OR (yuan wang))) or (yao yang)) human gender i die von seo ;~".
• Adding a wildcard symbol may retrieve word variants: (wan or lang) ((((yuan kang) OR (yuan wang))) or (yao yang)) human gender i die von seo ;*.