Perhaps you should try some spelling variations:
built during » built housing, being during, exit during
lang yanling » wang yanling, wang yangming, zhang yunling
yanling big » calling big
iot during » boost during, sport during
risk hong » risk among, risk along, risk bond
big end » big bend, big dead, big head

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