Perhaps you should try some spelling variations:
longer days » long days, pioneer days
china weng » china wang, china west, china won
20 china » 2 china, 2012 china, 2013 china
wang wei » zhang wei, wang zhi
days 20 » das 20, day 20, days 2
yang yi » yang di, yang jui
yang xi » yang di, yang jui

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: longer days 20 china weng ((((yang yi) OR (yang xi))) or (yang judy)) ((cong shu) or (wang wei)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: longer days 20 china weng ((((yang yi) OR (yang xi))) OR (yang judy)) ((cong shu) OR (wang wei)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "longer days 20 china weng ((((yang yi) OR (yang xi))) or (yang judy)) ((cong shu) or (wang wei)) ;*".