Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
wang shawn » tan shawn
shen zhang » zhen zhang, shen chang, chen zheng
wang khan » wang yuhan, wang yan, wang ban
ming cong » minh cong, ming kong, ming code
cong zhi » zhong zhi, wang zhi, cong shu

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang qiao ((wang khan) or (wang shawn)) ((shen zhang) OR (cheng zhang)) ming cong zhi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang qiao ((wang khan) OR (wang shawn)) ((shen zhang) OR (cheng zhang)) ming cong zhi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang qiao ((wang khan) or (wang shawn)) ((shen zhang) OR (cheng zhang)) ming cong zhi ;".
• Adding a wildcard symbol may retrieve word variants: wang qiao ((wang khan) or (wang shawn)) ((shen zhang) OR (cheng zhang)) ming cong zhi ;*.