Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
yulu chen » yu chen
chan fong » chew fong, chan kang, chan ming
dong sind » dong sin, dong bin, dong ping
yu cheng » yu chen, _ cheng
chan eng » chan kang, chan ming, han en
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) OR (chan fong)) 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) OR (chan fong)) dong sind ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "zhang yan yao ((yulu chen) or (yu cheng)) ((chan eng) OR (chan fong)) dong sind ;".
• Adding a wildcard symbol may retrieve word variants: zhang yan yao ((yulu chen) or (yu cheng)) ((chan eng) OR (chan fong)) dong sind ;*.