Perhaps you should try some spelling variations:
lang oanh » lang lang
oven ping » oven king, chen ping, yuen ping
ping john » king john, kong john, wong john
kong your » kong young, knowing your
tran duc » tran dai
tran dat » tran nam, tran van
kong siu » kong eiu, wong siu, dong sin
von sam » von sa, von sap, von scham

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang oanh ((tran duc) OR (tran dat)) oven ping john ((von sam) or (((kong siu) or (kong your)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang oanh ((tran duc) OR (tran dat)) oven ping john ((von sam) OR (((kong siu) OR (kong your)))) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang oanh ((tran duc) OR (tran dat)) oven ping john ((von sam) or (((kong siu) or (kong your)))) ;*".