Perhaps you should try some spelling variations:
yuan chang » yuan cheng, huang chang, han chang
change kia » change klaus, change korea
change ken » change kelly, change korea
long des » longum des, long days, long did
yan jiu » yang jie, yang jin, pang jiu
wang di » yang di, wang li, wang zhi
wang d » wang9 d, wang _, wang 3

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

• Performing a fuzzy search may retrieve terms with similar spellings: yuan chang ((((yan jiu) or (wang di))) or (wang d)) when ((change kia) OR (change ken)) long des ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yuan chang ((((yan jiu) OR (wang di))) OR (wang d)) when ((change kia) OR (change ken)) long des ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yuan chang ((((yan jiu) or (wang di))) or (wang d)) when ((change kia) OR (change ken)) long des ;*".