Perhaps you should try some spelling variations:
human gender » bhutan gender, german gender, human genome
human gene » human genome, human bone, human genetic
kong young » kang young, among young, young young
yang yang » wang yang, wang yan
tan yang » dan yang, tan ying, tan yong
ying tan » wing tan, liang tan, ying bank
jing ji » ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: tan yang yang ((human gene) OR (human gender)) ((ying tan) or (jing ji)) kong young ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tan yang yang ((human gene) OR (human gender)) ((ying tan) OR (jing ji)) kong young ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tan yang yang ((human gene) OR (human gender)) ((ying tan) or (jing ji)) kong young ;".
• Adding a wildcard symbol may retrieve word variants: tan yang yang ((human gene) OR (human gender)) ((ying tan) or (jing ji)) kong young ;*.