Perhaps you should try some spelling variations:
john ngosong » john song
wang oanh » wang yan, wang ban, wang dan
wang yang » wang yan, wang liang, wang yanling
yang john » young john, king john, yang jin
dang anh » duong anh
tran duc » tran dat, tran dai
ren yang » ren yan, chen yang, dan yang
duc ren » duc tran, duc vien

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: ((((wang oanh) OR (dang anh))) OR (wang yang)) tran duc ren yang john ngosong (sam OR same) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wang oanh) or (dang anh))) or (wang yang)) tran duc ren yang john ngosong (sam OR same) ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wang oanh) or (dang anh))) or (wang yang)) tran duc ren yang john ngosong (sam OR same) ;*.