Perhaps you should try some spelling variations:
"support technical intervention theories." » "support geotechnical interventions theories.", "support medical intervention theories.", "support technological interventions theories.", "support technical integration theories.", "support technical intervention tropes.", "support technical interventions series."
"support state integration series." » "support state integration services.", "support state interaction series.", "support state integration server.", "support statt integration series.", "support scale integration series.", "support space integration series.", "support stage integration series.", "support staff integration series.", "support start integration series."

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: (("support technical intervention theories.") OR ("support state integration series."))~.
• Removing quotes may allow a broader search: (( support technical intervention theories. ) or ( support state integration series. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support technical intervention theories.") or ("support state integration series."))*.