Perhaps you should try some spelling variations:
sharing risk » sharing best, during risk
chen zheng » chen zhen, chen aizheng, cheng zhang
zheng ping » zhang ping, zheng rong, chen ping
der cost » oder cost, user cost, debt cost
end cost » end close, land cost, end iot
how shih » how six
how she » how some, how safe

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: chen zheng ping ((der cost) OR (end cost)) sharing risk ((how she) OR (how shih)) ;~.
• Adding a wildcard symbol may retrieve word variants: chen zheng ping ((der cost) or (end cost)) sharing risk ((how she) or (how shih)) ;*.