Perhaps you should try some spelling variations:
chang boon » chang soon, cheng boon, chang gordon
chang won » chang soon, chang ann, chang min
han shen » khan sher, can she, han en
siong yu » hong yu, siong _, ming yu
wan yan » wang yan, nan yan, wai yan
yan yan » yan yuan, nan yan, yang yang
yan han » man han, yan zhang, kang han

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan yan yan han shen ((chang boon) OR (chang won)) siong yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wan yan yan han shen ((chang boon) OR (chang won)) siong yu ;".
• Adding a wildcard symbol may retrieve word variants: wan yan yan han shen ((chang boon) OR (chang won)) siong yu ;*.