Perhaps you should try some spelling variations:
longer days » long days, pioneer days
china dan » china den, china data, china des
yang jie » yang jui, yang xi, yang yi
yang jin » yang jun, shang jin, wang jing
ying jin » jing ji
a china » 2 china, 4 china, 3 china
days a » days _

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: longer days a china dan ((((yang jie) OR (yang di))) OR (((yang jin) OR (ying jin)))) cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "longer days a china dan ((((yang jie) OR (yang di))) or (((yang jin) or (ying jin)))) cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: longer days a china dan ((((yang jie) OR (yang di))) or (((yang jin) or (ying jin)))) cong shu ;*.