Perhaps you should try some spelling variations:
wang dong » wang yong, wang yang, wang jing
wang hong » wang yong, wang hyoung, wang lihong
ryan john » brian john, tian john
yang hua » wang hua, yang hui, ying hua
yan john » gain john, tian john, von john
hua ren » hua chen
sau » saur, sabu, saul

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: ((wang dong) OR (wang hong)) yang hua ren ((yan john) OR (ryan john)) ngosong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang dong) or (wang hong)) yang hua ren ((yan john) OR (ryan john)) ngosong sau ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang dong) or (wang hong)) yang hua ren ((yan john) OR (ryan john)) ngosong sau ;*.