Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
state intervention » health interventions
intervention terms » interaction terms, intervention systems, intervention powers
a integration » _ integration, can integration, eu integration
support state » support staff, support strategy, support estimate
support a » support _

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( support a integration theories. ) or ( support state intervention terms. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support a integration theories. ) OR ( support state intervention terms. )).
• Adding a wildcard symbol may retrieve word variants: (( support a integration theories. ) or ( support state intervention terms. ))*.