Perhaps you should try some spelling variations:
change john » changed john, chasse john, change japan
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
wong siu » wong shiu, wong sau, wong siew
kong siu » kong eiu, dong sin, kong sar
19 when » 9 when
1 when » 3 when, 4 when, 2 when

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang yang ((1 when) OR (19 when)) change john ((wong siu) or (kong siu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang yang ((1 when) OR (19 when)) change john ((wong siu) OR (kong siu)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yang ((1 when) OR (19 when)) change john ((wong siu) or (kong siu)) ;".
• Adding a wildcard symbol may retrieve word variants: wang yang yang ((1 when) OR (19 when)) change john ((wong siu) or (kong siu)) ;*.