Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
yulu chen » yu chen
dong sind » dong sin, dong bin, dong ping
yu cheng » yu chen, _ cheng
chan eng » chan fong, chan kang, chan ming
eng dong » jeng dong, eng hong, zeng doug
yan yao » yang yao, gang yao, yan yuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: zhang yan yao ((yulu chen) or (yu cheng)) chan eng dong sind ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: zhang yan yao ((yulu chen) OR (yu cheng)) chan eng dong sind ;.
• Adding a wildcard symbol may retrieve word variants: zhang yan yao ((yulu chen) or (yu cheng)) chan eng dong sind ;*.