Perhaps you should try some spelling variations:
change soon » chang soon, change seen, change snow
soon siong » boon siong, soon seng, soon soon
yang yang » wang yang
yan yuan » yan guan, fang yuan, nan yan
siong yu » hong yu, siong _, ming yu
a when » 3 when, 1 when, 2 when
4 when » 3 when

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang ((((wang yan) or (yan yuan))) or (yang yang)) ((a when) OR (4 when)) change soon siong yu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang ((((wang yan) OR (yan yuan))) OR (yang yang)) ((a when) OR (4 when)) change soon siong yu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((((wang yan) or (yan yuan))) or (yang yang)) ((a when) OR (4 when)) change soon siong yu ;*".