Perhaps you should try some spelling variations:
chang soon » chin soon, chang gordon
lang wang » hong wang, ping wang, yan wang
lang lang » ylang ylang
chang won » chang ann, chang min, chang you
yang yi » yang di, yang xi, yang jui
yi chen » jui chen
heng yu » zheng yu, heng fu, hong yu

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: ((lang wang) OR (lang lang)) yang yi chen ((chang soon) OR (chang won)) heng yu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang wang) or (lang lang)) yang yi chen ((chang soon) OR (chang won)) heng yu ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang wang) or (lang lang)) yang yi chen ((chang soon) OR (chang won)) heng yu ;*.