Perhaps you should try some spelling variations:
"supply functions integration theories." » "supply functional integration theories.", "supply function interaction theories.", "supply functional interaction theories.", "supply functions integration theorems.", "supply functions integrationstheorie 2.", "supply functions integration series.", "supply function integration theories.", "supply conditions integration theories."
"supply options integration theory." » "supply adoption integration theory.", "supply national integration theory.", "supply persons integration theory.", "supply options integration through.", "supply options information theory.", "supply options innovation theory.", "supply conditions integration theory.", "supply equations integration theory."

Try widening your search to All Fields.

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

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