Perhaps you should try some spelling variations:
exit during » credit during, mexico during
during risk » using risk, during crises, during crisis
among shiu » among sri, wong shiu
wang yang » wang yan, wang liang, wang yanling
yang ring » yang jing, yang liang, yang using
among hiv » among heis, among di, among hr
ring und » ding und
und exit » und exil, aid exit, und east

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: wang yang ring und exit during risk ((among shiu) OR (among hiv)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang yang ring und exit during risk ((among shiu) or (among hiv)) ;*.