Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
yang ying » yang yang, yang jing, huang ying
using rs » using r, using risk, using _
how some » how women
ying eu » ying zhu, using eu, ying hua
eu cost » au costa, der cost, end cost
how she » how safe, how shih
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: wang yang ying eu cost ((during crises) or (using rs)) ((how she) OR (how some)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang ying eu cost ((during crises) OR (using rs)) ((how she) OR (how some)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang ying eu cost ((during crises) or (using rs)) ((how she) OR (how some)) ;*".