Perhaps you should try some spelling variations:
wing yanling » wang yanling, wang yangming
yanling yang » yang yang, ying yang
yang duty » yang judy, can duty, yang du
duty cost » duty case
using rs » using r, using risk, using _
how some » how women
crises » crisis

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wing yanling yang duty cost ((during crises) or (using rs)) how some ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wing yanling yang duty cost ((during crises) OR (using rs)) how some ;*.