Perhaps you should try some spelling variations:
"supply systems integration theories." » "supply systems integration theory.", "supply systems integration through.", "supply systems integration efforts.", "supply system integration theories."
"supply facto integration schemes." » "supply facto irrigation schemes.", "supply facto integration some.", "supply factor integration schemes.", "supply faculty integration schemes.", "supply sector integration schemes.", "supply factors integration schemes.", "supply data integration schemes."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply systems integration theories.") or ("supply facto integration schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply systems integration theories.") OR ("supply facto integration schemes.")).
• Removing quotes may allow a broader search: (( supply systems integration theories. ) or ( supply facto integration schemes. )).
• Adding a wildcard symbol may retrieve word variants: (("supply systems integration theories.") or ("supply facto integration schemes."))*.