Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
yang yang » wang yang, wang yan
yulu chen » yu chen
chan eng » chan fong, chan kang, chan ming
eng wong » eng hong, eng seng
wong siu » wong shiu, kong siu, wong sau
dean » dewan, jean, den

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

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