Perhaps you should try some spelling variations:
ying system » yang system, buying system, typing system
zhang wing » zhang ming, zhang jing, zhang ping
wei yang » pei yang, wei wang, wei yang's
wing tan » wing ian, liang tan, hong tan
tan yang » dan yang, tan ying, tan yong
yang yi » yang xi, yang jui
yang li » yang lin, yang xi, tang li

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: ((wei yang) OR (((yang di) OR (yang yi)))) zhang wing tan yang li ying system ;~.
• Adding a wildcard symbol may retrieve word variants: ((wei yang) or (((yang di) or (yang yi)))) zhang wing tan yang li ying system ;*.