Perhaps you should try some spelling variations:
chen chung » chen chuling, chen shuang, chen chuan
chen young » chen yong, chen yang, chen dung
lang yan » wang yan, wang yang, zhang yan
yan yang » yang yang, yao yang, dan yang
song sau » wong sau, song pae, song so
yang yi » yang di, yang xi, yang jui
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan yang yi ((chen young) OR (chen chung)) john ((song sau) or (kong sar)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan yang yi ((chen young) OR (chen chung)) john ((song sau) OR (kong sar)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan yang yi ((chen young) OR (chen chung)) john ((song sau) or (kong sar)) ;".
• Adding a wildcard symbol may retrieve word variants: lang yan yang yi ((chen young) OR (chen chung)) john ((song sau) or (kong sar)) ;*.