Perhaps you should try some spelling variations:
during crisis » during crises, housing crisis
yanling big » calling big
during risk » using risk, during crises, reducing risk
hong shu » cong shu, tong shui, wong shiu
big end » big bend, big dead, big head
end iot » end note, end cost
wang » wing, lang

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 OR wan) yanling big end iot ((during risk) OR (during crisis)) hong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or wan) yanling big end iot ((during risk) OR (during crisis)) hong shu ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or wan) yanling big end iot ((during risk) OR (during crisis)) hong shu ;*.