Perhaps you should try some spelling variations:
dunning john » gunning jan
strong john » strongman john
longo john » kong john, wong john
wang yang » wang yan, wang liang, wang yanling
yang kang » yang yang, yang guang, yang liang
kang sein » kann ein
sein das » sein des, sein de, sein du
wong siu » wong shiu, kong siu, wong sau

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: wang yang kang sein das ((dunning john) OR (((strong john) OR (longo john)))) wong siu ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang kang sein das ((dunning john) or (((strong john) or (longo john)))) wong siu ;*.