Perhaps you should try some spelling variations:
than change » chain change, can change, mean change
shen chang » when change, chin chang, han chang
won jeong » min jeong
jeong shu » jeong su, cong shu
yang yao » yang yang, wang yan, yang fan
yao yang » yang yang
yang yi » yang di, yang xi, 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: yang yao yang yi ((shen chang) or (than change)) won jeong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yao yang yi ((shen chang) OR (than change)) won jeong shu ;*.