Perhaps you should try some spelling variations:
chang boon » cheng boon, chang won, chang gordon
chang soon » chang won, chin soon, chang gordon
chong seo » hong seo, chong en, chong suk
yao ying » yao yang, fan ying, ka ying
gao ying » yao yang, fan ying, ka ying
hua shen » hua chen, han shen, hua ren

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: gang ((yao ying) OR (gao ying)) hua shen ((chang boon) OR (chang soon)) chong seo ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "gang ((yao ying) or (gao ying)) hua shen ((chang boon) OR (chang soon)) chong seo ;~".
• Adding a wildcard symbol may retrieve word variants: gang ((yao ying) or (gao ying)) hua shen ((chang boon) OR (chang soon)) chong seo ;*.