Perhaps you should try some spelling variations:
basic postal » basic cost, basic costs
during risk » using risk, during crises, during crisis
von cash » von carl, can cash, do cash
yang jui » yang judy, yang di, yang yi
wai yan » wang yan, wei yang
yang mu » yang du, yang muxi, yang jun
yang xi » yang di, yang yi
yan ji » yan jiu, ban ji, pan ji

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: wai yan ji ((basic postal) OR (von cash)) during risk ((((yang mu) OR (yang jui))) OR (yang xi)) ;~.
• Adding a wildcard symbol may retrieve word variants: wai yan ji ((basic postal) or (von cash)) during risk ((((yang mu) or (yang jui))) or (yang xi)) ;*.