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

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang oanh) or (wang yan)) tran duc ren yang john ngosong sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang oanh) OR (wang yan)) tran duc ren yang john ngosong sam ;.
• Adding a wildcard symbol may retrieve word variants: ((wang oanh) or (wang yan)) tran duc ren yang john ngosong sam ;*.