Perhaps you should try some spelling variations:
yan zhang » yuan chang, bin zhang, han chang
zhang lei » zhang wei, zhang dai
shang kai » shang hai
lei chen » li chen, frei chen, lei sheng
yang jie » yang di, yang jui, yang jun
yang jin » yang jun, ying jin, shang jin
nan yan » nan ya, wang yan, qian yan
yang yi » yang di, yang jui
yang xi » yang di, 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: nan yan zhang lei chen ((((((yang jie) or (yang yi))) or (yang jin))) or (yang xi)) shang kai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan zhang lei chen ((((((yang jie) OR (yang yi))) OR (yang jin))) OR (yang xi)) shang kai ;*.