Perhaps you should try some spelling variations:
gordon sperry » gordon henry
clark gordon » craig gordon
sperry len » sherry lee
yang yuan » fang yuan, yan yuan, yang yun
yuan ming » yuan ting, kian ming, tuan minh
lu chen » li chen, yulu chen, jui chen
yu chen » yu cheng, yi chen, yulu chen

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

• Performing a fuzzy search may retrieve terms with similar spellings: yang yuan ming ((lu chen) or (yu chen)) clark gordon sperry len ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yuan ming ((lu chen) OR (yu chen)) clark gordon sperry len ;.
• Adding a wildcard symbol may retrieve word variants: yang yuan ming ((lu chen) or (yu chen)) clark gordon sperry len ;*.