Perhaps you should try some spelling variations:
crises china » crisis china's, classes china, crises asia
wang luhang » wang liang, wang lihong, wang yuhan
luhang ying » huang ying, liang ying, zhang ying
can costa » can cost, can postal, da costa
china shu » china shen, china sea, china saw
au costa » _ costa, da costa, de costa
der cost » oder cost, user cost, debt 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 luhang ying ((((au costa) OR (can costa))) OR (der cost)) during crises china shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang luhang ying ((((au costa) OR (can costa))) or (der cost)) during crises china shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang luhang ying ((((au costa) OR (can costa))) or (der cost)) during crises china shu ;*.