Perhaps you should try some spelling variations:
intervention studies » intervention strategies, international studies
case intervention » care intervention, cash intervention, care interventions
supply proverty » supply poverty, supply projects, supply project
proverty inter » property center, poverty index, poverty after
inter service » water service, einer service, under service
supply case » supply cost, supply chain, supply curve

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply case intervention studies. ) or ( supply proverty inter service. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply case intervention studies. ) OR ( supply proverty inter service. )).
• Adding a wildcard symbol may retrieve word variants: (( supply case intervention studies. ) or ( supply proverty inter service. ))*.