Perhaps you should try some spelling variations:
human gender » bhutan gender, german gender, human genome
human gene » human genome, human bone, human genetic
wang hong » wang yong, wang hyoung, wang lihong
yang july » yang judy, yang jui, yang jun
shang hai » shang kai, dang hai, chang ha
hong 2 » hong w, hong 7, hong a

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang hong 2 ((human gene) OR (human gender)) ((yang di) or (yang july)) shang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang hong 2 ((human gene) OR (human gender)) ((yang di) OR (yang july)) shang hai ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong 2 ((human gene) OR (human gender)) ((yang di) or (yang july)) shang hai ;".
• Adding a wildcard symbol may retrieve word variants: wang hong 2 ((human gene) OR (human gender)) ((yang di) or (yang july)) shang hai ;*.