Perhaps you should try some spelling variations:
cheng han » chen hao
han ying » fan ying, ran ying, tan ying
der cost » oder cost, user cost, debt cost
au costa » can costa, _ costa, da costa
best how » bust how, test how, west how
eu cost » end cost, eu court, run cost
how shu » how she, how shih, how slum

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: cheng han ying ((((eu cost) OR (der cost))) OR (au costa)) sharing best how shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cheng han ying ((((eu cost) OR (der cost))) or (au costa)) sharing best how shu ;~".
• Adding a wildcard symbol may retrieve word variants: cheng han ying ((((eu cost) OR (der cost))) or (au costa)) sharing best how shu ;*.