Perhaps you should try some spelling variations:
young john » kong john, wong john, young jean
wang oanh » wang yan, wang yang, dang anh
yang john » king john, yang jin, kong john
tran duc » tran dat, tran dai
yang jun » yang jui, pang jun, yang jin
bonn sam » bonn am, bonn zum, bonn a
tan hua » tuan hua, wang hua, tan chia

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 duc) or (tan hua)) chen ((((yang john) OR (yang jun))) or (young john)) bonn sam ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang oanh ((tran duc) OR (tan hua)) chen ((((yang john) OR (yang jun))) OR (young john)) bonn sam ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang oanh ((tran duc) or (tan hua)) chen ((((yang john) OR (yang jun))) or (young john)) bonn sam ;".
• Adding a wildcard symbol may retrieve word variants: wang oanh ((tran duc) or (tan hua)) chen ((((yang john) OR (yang jun))) or (young john)) bonn sam ;*.