Perhaps you should try some spelling variations:
change has » change hands, change heat, change how
wang yong » wang yang, wang hyoung, wang yan
quan guan » gan guan, quan guo, yan guan
chang hai » chang ha, shang hai, dang hai
yan yuan » yan guan, fang yuan, nan yan
kai fang » cai fang, kai fa, kai hong
fang jin » yang jin, shang jin, wang jing

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: wang yong ((yan yuan) OR (quan guan)) kai fang jin ((chang hai) OR (change has)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong ((yan yuan) or (quan guan)) kai fang jin ((chang hai) OR (change has)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong ((yan yuan) or (quan guan)) kai fang jin ((chang hai) OR (change has)) ;*.