Perhaps you should try some spelling variations:
credit during » credit scoring, credit rating, exit during
dean credit » clean credit, deals credit, de credit
during risk » using risk, during crises, during crisis
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
among hiv » among heis, among di, among hr

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 yang) or (wang yang)) dean credit during risk among hiv ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yang yang) OR (wang yang)) dean credit during risk among hiv ;*.