Perhaps you should try some spelling variations:
yan ping » ya ping, yan liang, yang jing
kong siu » wong siu, dong sin, kong sar
kong eiu » tonga eiu
dong di » dong sin
nan yan » nan ya, qian yan, dan yang
yi kang » xi kang, yi gang, jin kang
yi yang » yin yang, yi gang, yu yang
wang » wing, wan, lang

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 yan) OR (dong di)) nan yan ping ((yi kang) OR (yi yang)) ((kong siu) OR (kong eiu)) ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (dong di)) nan yan ping ((yi kang) or (yi yang)) ((kong siu) or (kong eiu)) ;*.