Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
yang yang » wang yang, wang yan
tong shui » tong hui, cong shu, gong hui
yang yao » wang yan, yang yi, yang fan
yang min » yang mind, tang min, yang lin
yang jin » yang jie, yang jun, ying jin
hong shu » cong shu, wong shiu, hong seo
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: yang yang yao ((human gene) or (a gene)) ((yang min) or (yang jin)) ((hong shu) OR (tong shui)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yang yao ((human gene) OR (a gene)) ((yang min) OR (yang jin)) ((hong shu) OR (tong shui)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang yang yao ((human gene) or (a gene)) ((yang min) or (yang jin)) ((hong shu) OR (tong shui)) ;*".