Perhaps you should try some spelling variations:
cost sharing » risk sharing, cost savings
sharing risk » sharing best, during risk
dong hoang » hong hong
among shu » cong shu, among eu, among sex
among di » among hiv, among idp, among _
up cost » up costs
yaa » yana, yala, yama

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong hoang yaa up cost sharing risk ((among shu) or (among di)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong hoang yaa up cost sharing risk ((among shu) OR (among di)) ;.
• Adding a wildcard symbol may retrieve word variants: dong hoang yaa up cost sharing risk ((among shu) or (among di)) ;*.