Perhaps you should try some spelling variations:
changes merging » change emerging, changes managing, changes during
xinyan zhang » xiulan zhang, xiliang zhang, xiao zhang
changes than » changes can, changes thus, changes ahead
wang xinyan » wang xiuyan, wang bingnan
zhang ii » zhang i, zhang li, zhang si
wei cong » li cong, wei ming, wei wang

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

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