Perhaps you should try some spelling variations:
und thanh » und tanz
ping john » king john, kong john, wong john
lang und » klang und, langs und, gang und
thanh vu » thanh van, thanh _
vu irene » _ irene
yang jui » yang judy, yang di, yang xi
wong siu » wong shiu, kong siu, wong sau

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang und thanh vu irene ((ping john) or (yang jui)) wong siu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang und thanh vu irene ((ping john) OR (yang jui)) wong siu ;.
• Adding a wildcard symbol may retrieve word variants: lang und thanh vu irene ((ping john) or (yang jui)) wong siu ;*.