Perhaps you should try some spelling variations:
juan meng » juan rene, jui meng, yuan ming
chan kang » chung kang, chan eng, chan jan
chan fong » chew fong, chan eng, chan ming
done sin » dong sin, done using, done so
roa juan » rojas juan, mora juan, rios juan
wong yue » wang yue
sin roa » sin rom

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

• If you are trying to use Boolean operators, they must be ALL CAPS: done sin roa juan meng ((chan kang) OR (chan fong)) ((hong yu) OR (wong yue)) ;~.
• Adding a wildcard symbol may retrieve word variants: done sin roa juan meng ((chan kang) or (chan fong)) ((hong yu) or (wong yue)) ;*.