Perhaps you should try some spelling variations:
"support grant integration theories." » "support grant integration through.", "support grant integration efforts.", "support grant integration reforms.", "support migrant integration theories.", "support trade integration theories.", "support grid integration theories."
"supply factor integration theory." » "supply factor integration through.", "supply factor information theory.", "supply factor integration report.", "supply facto integration theory.", "supply sector integration theory.", "supply faculty integration theory.", "supply factors integration theory.", "supply water integration theory."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply factor integration theory.") OR ("support grant integration theories."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"supply factor integration theory.\") OR (\"support grant integration theories.\"))".
• Removing quotes may allow a broader search: (( supply factor integration theory. ) OR ( support grant integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("supply factor integration theory.") OR ("support grant integration theories."))*.