Perhaps you should try some spelling variations:
ong china » kong china, ming china, qing china
china has » china have, china how
wing yan » wang yan, wing ian, wing tan
wei yang » pei yang, wei wang, wei yang's
yang hui » yang jui, wang hui, yang muxi
has done » has gone, has one, has money
yang xi » yang di, yang jui
yang yi » yang di, yang jui

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: ((wing yan) OR (wei yang)) ((((yang hui) OR (yang xi))) OR (yang yi)) ong china has done so ;~.
• Adding a wildcard symbol may retrieve word variants: ((wing yan) or (wei yang)) ((((yang hui) or (yang xi))) or (yang yi)) ong china has done so ;*.