Perhaps you should try some spelling variations:
"support grant integration efforts." » "support grant international efforts.", "support grant conservation efforts.", "support migrant integration efforts.", "support trade integration efforts.", "support grid integration efforts."
"support tax integration theory." » "support tax integration through.", "support tax information theory.", "support tax integration report.", "support can integration theory.", "support tax interaction theory.", "support trade integration theory.", "support a integration theory.", "support staff integration theory.", "support state integration theory."

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 grant integration efforts.") OR ("support tax integration theory."))~.
• Removing quotes may allow a broader search: (( support grant integration efforts. ) or ( support tax integration theory. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support grant integration efforts.") or ("support tax integration theory."))*.