Perhaps you should try some spelling variations:
during risk » using risk, during crises, during crisis
wang zhang » wang luhang, zhang zhang, wang liang
wang zheng » tang zheng, wang zhenpo, fang sheng
iran cost » urban cost, iran case, can cost
among shu » cong shu, among eu, among sex
run out » runs out, ran out, burn out

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 zhang) OR (wang zheng)) ying ((run out) OR (iran cost)) during risk among shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang zhang) OR (wang zheng)) ying ((run out) or (iran cost)) during risk among shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang zhang) OR (wang zheng)) ying ((run out) or (iran cost)) during risk among shu ;*.