Perhaps you should try some spelling variations:
human gender » bhutan gender, german gender, human genome
human gene » human genome, human bone, human genetic
yang ying » yang yang, yang jing, huang ying
yang min » yang mind, yang jin, tang min
hong shu » cong shu, tong shui, wong shiu
ying ya » ying yang, yang yao, king yax

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang ying ya ((human gene) OR (human gender)) ((yang min) or (yang di)) hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang ying ya ((human gene) OR (human gender)) ((yang min) OR (yang di)) hong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang ying ya ((human gene) OR (human gender)) ((yang min) or (yang di)) hong shu ;*".