Perhaps you should try some spelling variations:
"support group integration theories." » "support group integration theory.", "support group integration through.", "support group integration efforts.", "support grid integration theories.", "support run integration theories.", "support through integration theories.", "support from integration theories.", "support grant integration theories."
"supply chain integration volume." » "supply chain integration policy.", "supply trade integration volume.", "supply data integration volume.", "supply grid integration volume."

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 group integration theories.") OR ("supply chain integration volume."))~.
• Removing quotes may allow a broader search: (( support group integration theories. ) or ( supply chain integration volume. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support group integration theories.") or ("supply chain integration volume."))*.