Perhaps you should try some spelling variations:
interventions helping » interventions having, interventions help, interventions during
state interventions » state intervention, health interventions, based interventions
integration series » integration theories, integrating services, integration schemes
support state » support staff, support strategy, support estimate
import trade » export trade, import price, import taxes

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: (( import trade integration series. ) OR ( support state interventions helping. ))~.
• Adding a wildcard symbol may retrieve word variants: (( import trade integration series. ) or ( support state interventions helping. ))*.