Perhaps you should try some spelling variations:
"support carbon integration efforts." » "support carbon international efforts.", "support carbon conservation efforts.", "support carlo integration efforts.", "support urban integration efforts.", "support can integration efforts.", "supporting carbon integration efforts.", "support common integration efforts."
"support deep irrigation systems." » "support drip irrigation systems.", "support delta irrigation systems.", "support level irrigation systems.", "supported deep irrigation systems.", "support de irrigation systems.", "support does irrigation systems.", "support deep irrigation system."

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 systems."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support carbon integration efforts.") OR ("support deep irrigation systems."))*.
• Removing quotes may allow a broader search: (( support carbon integration efforts. ) or ( support deep irrigation systems. ))*.