Perhaps you should try some spelling variations:
chasse john » class john, chassama john, changed john
change john » changed john, change japan, channon john
wang yao » yang yao, gang yao, wang tao
yang jia » yang jie, yang jin, yang jing
jia when » jia shen, java when, a when
wong siu » wong shiu, kong siu, 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: ((wang yao) OR (wang yan)) yang jia when ((change john) OR (chasse john)) wong siu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yao) or (wang yan)) yang jia when ((change john) or (chasse john)) wong siu ;*.