Perhaps you should try some spelling variations:
using system » housing system, housing systems, rating system
cheng zhang » cheng han, zhen zhang, chen zheng
wang cheng » wang zheng, huang cheng, fang sheng
zhang ying » zhang ming, zhang jing, zhang ping
iii using » ii using, iii king
ying iii » ying jin
wai yan » wang yan, wei yang
yang xi » yang di, yang jui
yang yi » yang di, yang jui

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: ((wai yan) OR (((yang xi) OR (yang yi)))) wang cheng zhang ying iii using system ;~.
• Adding a wildcard symbol may retrieve word variants: ((wai yan) or (((yang xi) or (yang yi)))) wang cheng zhang ying iii using system ;*.