Perhaps you should try some spelling variations:
"support carbon integration efforts." » "support carbon international efforts.", "support carbon conservation efforts.", "support urban integration efforts.", "support can integration efforts.", "support care integration efforts.", "supporting carbon integration efforts."
"support deep irrigation schemes." » "support deep irrigation scheme.", "support deep irrigation systems.", "support drip irrigation schemes.", "support level irrigation schemes.", "support crop irrigation schemes.", "support does irrigation schemes.", "support them irrigation schemes.", "support data 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 carbon integration efforts.") or ("support deep irrigation schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support carbon integration efforts.") OR ("support deep irrigation schemes."))*.
• Removing quotes may allow a broader search: (( support carbon integration efforts. ) or ( support deep irrigation schemes. ))*.