Perhaps you should try some spelling variations:
wang oanh » wang yan, wang yang, dang anh
oanh tran » anh tran, anh tuan, binh tran
yang john » young john, king john, yang jin
tran hua » tan hua, tuan hua, tran duc
hua chen » jui chen, yu chen, a chen
yang jie » yang jin, yang di, yang jui
wong sau » wong sam, wong siu, wong shiu

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 tran hua chen ((yang john) OR (yang jie)) wong sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang oanh tran hua chen ((yang john) OR (yang jie)) wong sau ;".
• Adding a wildcard symbol may retrieve word variants: wang oanh tran hua chen ((yang john) OR (yang jie)) wong sau ;*.