Perhaps you should try some spelling variations:
knowing about » known about, know about, knowing your
john knowing » how knowing, john bowring, john king
huang yang » huang ying, huang chang, yang yang
wang yang » wang yan, wang liang
fang wei » wang wei, zhang wei, liang wei
1 king » _ king
wei 1 » web 1, wei _

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) OR (wang yanling))) OR (huang yang)) fang wei 1 king john knowing about ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wang yang) OR (wang yanling))) or (huang yang)) fang wei 1 king john knowing about ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wang yang) OR (wang yanling))) or (huang yang)) fang wei 1 king john knowing about ;*.