Perhaps you should try some spelling variations:
dong sign » dong sin, among sign, dong bin
rene tuan » rene ten
minh wang » minh cong, ping wang
roa juan » rojas juan, mora juan, rios juan
yee tuan » le tuan, yee shan
wang yue » wong yue, wang hua, wang yan
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 ((ya juan) OR (roa juan)) ((rene tuan) OR (yee tuan)) minh wang yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong sign ((ya juan) or (roa juan)) ((rene tuan) OR (yee tuan)) minh wang yue ;~".
• Adding a wildcard symbol may retrieve word variants: dong sign ((ya juan) or (roa juan)) ((rene tuan) OR (yee tuan)) minh wang yue ;*.