Perhaps you should try some spelling variations:
"support trainer integration efforts." » "support trainer international efforts.", "support trainer conservation efforts.", "support trade integration efforts.", "support einer integration efforts.", "support tracking integration efforts.", "support teacher integration efforts.", "support tier integration efforts."
"support scale irrigation systems." » "support stage irrigation systems.", "support state irrigation systems.", "support scaling irrigation systems.", "support scale irrigation system."

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 trainer integration efforts.") OR ("support scale irrigation systems."))~.
• Removing quotes may allow a broader search: (( support trainer integration efforts. ) or ( support scale irrigation systems. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support trainer integration efforts.") or ("support scale irrigation systems."))*.