Perhaps you should try some spelling variations:
yang ying » yang yang, yang jing, huang ying
hua gene » human gene, hua ren, hy5 gene
tang min » chang min, sang minh, yang mind
yang jie » yang jin, yang di, yang jui
hong shu » cong shu, tong shui, wong shiu
ying ya » ying yang, yang yao, king yax
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 ying ya ((hua gene) or (a gene)) ((tang min) or (yang jie)) hong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang ying ya ((hua gene) OR (a gene)) ((tang min) OR (yang jie)) hong shu ;*.