Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
wang yang » wang yan, wang liang, wang yanling
yang min » yang mind, tang min, yang lin
yang jin » yang jie, yang jun, ying jin
hong hai » shang hai, zhong tai, dang hai
yang xi » yang di, yang yi, yang jui
a gene » a genre, a gender, a gentle

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang xi ((a gene) or (human gene)) ((yang min) or (yang jin)) hong hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang xi ((a gene) OR (human gene)) ((yang min) OR (yang jin)) hong hai ;.
• Adding a wildcard symbol may retrieve word variants: wang yang xi ((a gene) or (human gene)) ((yang min) or (yang jin)) hong hai ;*.