Perhaps you should try some spelling variations:
gene yang » gene bank
yang ying » yang yang, yang jing, huang ying
ying hua » ming hua, wang hua, ying zhu
hua gene » human gene, a gene, hua ren
yang hoi » yang hui, yang di, yang jui
hoi ying » li ying
ying sau » ying zhu, wong sau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (wing OR wan) yang ying hua gene yang hoi ying sau ;~.
• Adding a wildcard symbol may retrieve word variants: (wing or wan) yang ying hua gene yang hoi ying sau ;*.