Perhaps you should try some spelling variations:
ratings risk » patients risk
bond ratings » bond trading
risk coping » risk pooling
coping shu » cong shu
nana yaa » nan ya, nanay a
hua bond » a bond, hua ban, un bond
nan yan » nan ya, wang yan, qian yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((nana yaa) or (nan yan)) hua bond ratings risk coping shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((nana yaa) OR (nan yan)) hua bond ratings risk coping shu ;.
• Adding a wildcard symbol may retrieve word variants: dong ((nana yaa) or (nan yan)) hua bond ratings risk coping shu ;*.