Perhaps you should try some spelling variations:
dong sign » dong sin, among sign, dong bin
rene tuan » rene ten, yee tuan
minh wong » minh cong, ming kong, vinh long
roa juan » rojas juan, mora juan, rios juan
min hong » amin hong, tin hong, min hyoung
dong di » dong sin
ya juan » y juan, san juan

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: ((dong sign) OR (dong di)) ((ya juan) OR (roa juan)) rene tuan ((minh wong) OR (min hong)) yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong sign) or (dong di)) ((ya juan) or (roa juan)) rene tuan ((minh wong) OR (min hong)) yue ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong sign) or (dong di)) ((ya juan) or (roa juan)) rene tuan ((minh wong) OR (min hong)) yue ;*.