Perhaps you should try some spelling variations:
"support crop international efforts." » "support crop international airports.", "support crop international energy.", "support crop international airport.", "support eaap international efforts.", "support action international efforts.", "support 2 international efforts.", "support crops international efforts.", "support cross international efforts.", "support across international efforts."
"supply canal irrigation systems." » "supply scale irrigation systems.", "supply canada irrigation systems.", "supply annual irrigation systems.", "supply china irrigation systems.", "supply canal 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: (("supply canal irrigation systems.") OR ("support crop international efforts."))~.
• Removing quotes may allow a broader search: (( supply canal irrigation systems. ) or ( support crop international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply canal irrigation systems.") or ("support crop international efforts."))*.