Perhaps you should try some spelling variations:
dang binh » dann bin, dong bin, dang anh
chen ryan » cohen ryan, chen siyan, chen yang
ryan john » brian john, tian john
yuan hui » yuan fei, jaan hui, tuan hua
tan hua » tuan hua, wang hua, tan chia
von sam » von sa, von sap, von scham
sar » sara, star, saur

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: dang binh ((yuan hui) OR (tan hua)) chen ryan john ((von sam) OR (kong sar)) ;~.
• Adding a wildcard symbol may retrieve word variants: dang binh ((yuan hui) or (tan hua)) chen ryan john ((von sam) or (kong sar)) ;*.