Perhaps you should try some spelling variations:
changes china » change china, changed china, exchanges china
xiulan zhang » xiliang zhang, xiao zhang, xuan thang
wang xiulan » wang xiuyan, wang xinyan, wang xuan
changes can » change can, changes than, changes a
wei cong » li cong, wei ming, wei wang
zhang i » zhang ii, zhang li, zhang si

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang xiulan zhang i ((changes china) or (changes can)) wei cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang xiulan zhang i ((changes china) OR (changes can)) wei cong shu ;*.