Perhaps you should try some spelling variations:
"support policy integration efforts." » "support policy international efforts.", "support policy conservation efforts.", "support political integration efforts.", "support policy intervention efforts.", "support policies integration efforts.", "import policy integration efforts."
"support data irrigation schemes." » "support data irrigation scheme.", "support data irrigation systems.", "support delta irrigation schemes.", "support canal irrigation schemes.", "support water irrigation schemes.", "support a irrigation schemes.", "support de irrigation schemes."

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

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