Perhaps you should try some spelling variations:
kai kyoung » kim kyoung, yi kyoung
silk china » risk china
kyoung yun » young yun, kyoung yang, hyoung gun
long span » long han
china kai » china key
dong di » dong sin
ye a » yet a, e a, me a
u a » up a, eu a, uk a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((long span) or (dong di)) ((u a) or (ye a)) silk china kai kyoung yun ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((long span) OR (dong di)) ((u a) OR (ye a)) silk china kai kyoung yun ;.
• Adding a wildcard symbol may retrieve word variants: ((long span) or (dong di)) ((u a) or (ye a)) silk china kai kyoung yun ;*.