Perhaps you should try some spelling variations:
lang oanh » lang lang
oanh tran » anh tran, anh tuan, binh tran
oven wing » oven king
wing john » king john, wong john, wrong john
kong saur » kong sar, kong siu, kong your
tran duc » tran dat, tran dai
duc oven » duc vien
know » known

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: lang oanh tran duc oven wing john ((von scham) OR (((kong saur) OR ((know OR now) about)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang oanh tran duc oven wing john ((von scham) or (((kong saur) or ((know OR now) about)))) ;~".
• Adding a wildcard symbol may retrieve word variants: lang oanh tran duc oven wing john ((von scham) or (((kong saur) or ((know OR now) about)))) ;*.