Perhaps you should try some spelling variations:
"supply basin irrigation schemes." » "supply basin irrigation scheme.", "supply basin irrigation systems.", "supply drip irrigation schemes.", "supply canal irrigation schemes.", "supply farm irrigation schemes.", "supply asia irrigation schemes.", "supply based irrigation schemes.", "supply design irrigation schemes."
"import duties integration social." » "import studies integration social.", "import dis integration social.", "import dutch integration social.", "import duties international social."

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 basin irrigation schemes.") OR ("import duties integration social."))~.
• Removing quotes may allow a broader search: (( supply basin irrigation schemes. ) or ( import duties integration social. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply basin irrigation schemes.") or ("import duties integration social."))*.