Perhaps you should try some spelling variations:
pioneer days » pioneering days, pioneer years, longer days
china weng » china wang, china west, china won
yang jui » yang judy, yang di
wang hui » wang hua, wang zhi, wang wei
2 china » 4 china
yang xi » yang di
yang yi » yang di
days 2 » days 12, days 20, day 2

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: pioneer days 2 china weng ((yang xi) OR (((yang jui) OR (yang yi)))) ((cong shu) OR (wang hui)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "pioneer days 2 china weng ((yang xi) or (((yang jui) OR (yang yi)))) ((cong shu) or (wang hui)) ;~".
• Adding a wildcard symbol may retrieve word variants: pioneer days 2 china weng ((yang xi) or (((yang jui) OR (yang yi)))) ((cong shu) or (wang hui)) ;*.