Perhaps you should try some spelling variations:
knowing about » known about, know about, knowing your
john knowing » how knowing, john bowring, john king
huang ying » huang jing, huang ting, huang yang
wang yang » wang yan, wang liang, wang yanling
zhang web » zhang wei, zhang lei, zhang mei
zhan wei » zhang wei, zhen wei, han wei
1 king » _ king

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