Perhaps you should try some spelling variations:
"supply trade integration schemes." » "supply trade integration schengen.", "supply trade integration regimes.", "supply trade integration some.", "supply case integration schemes."
"Supply canal irrigation schemes." » "Supply canal irrigation scheme.", "Supply canal irrigation systems.", "Supply scale irrigation schemes."
supply canal » supply canada, supply annual, supply china

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 schemes.") OR ("supply trade integration schemes."))~.
• Removing quotes may allow a broader search: (( Supply canal irrigation schemes. ) or ( supply trade integration schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("Supply canal irrigation schemes.") or ("supply trade integration schemes."))*.