Perhaps you should try some spelling variations:
crises china » crisis china's, classes china, crises asia
wang yuhan » wang luhang, wang yan, wang yidan
china shu » china shen, china sea, china saw
au costa » can costa, _ costa, da costa
der cost » oder cost, user cost, debt cost
eu cost » end cost, eu court, run cost

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 yuhan ying ((((eu cost) OR (au costa))) OR (der cost)) during crises china shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yuhan ying ((((eu cost) OR (au costa))) or (der cost)) during crises china shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang yuhan ying ((((eu cost) OR (au costa))) or (der cost)) during crises china shu ;*.