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
china shu » china shen, china sea, china saw
au costa » can costa, _ costa, da 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 (der cost)) during crises china shu ;~.
• Adding a wildcard symbol may retrieve word variants: wang luhang ying ((au costa) or (der cost)) during crises china shu ;*.