Perhaps you should try some spelling variations:
zhang soon » chang soon
yang yang » wang yang, wang yan
hsu china » eu china
soon wong » soon siong, john wong, soon ang
tan yang » dan yang, tan ying, tan yong
hsu chin » hsu bin, hsu shi
wong yue » wang yue, 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 ((tan yang) OR (yang yang)) ((hsu china) OR (hsu chin)) zhang soon wong yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang ((tan yang) or (yang yang)) ((hsu china) OR (hsu chin)) zhang soon wong yue ;~".
• Adding a wildcard symbol may retrieve word variants: lang ((tan yang) or (yang yang)) ((hsu china) OR (hsu chin)) zhang soon wong yue ;*.