Perhaps you should try some spelling variations:
china health » china's health, child health, capita health
gain sharing » basin sharing, chain sharing, fair sharing
yan china » can china, dan china, han china
gain sang » shin sang
min hong » amin hong, tin hong, min hyoung
wang » wing, wan, lang
tan » than

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 china health ((gain sang) OR (gain sharing)) min hong tan ;~.
• Adding a wildcard symbol may retrieve word variants: wang yan china health ((gain sang) or (gain sharing)) min hong tan ;*.