Perhaps you should try some spelling variations:
"supply water integration schemes." » "supply water irrigation schemes.", "supply water integration some.", "supply water integration theories.", "supply water integrating schemes.", "supply factor integration schemes.", "supply data integration schemes."
"import duty integration theory." » "import duty integration through.", "import duty information theory.", "import duty integration report.", "import data integration theory.", "import south integration theory.", "import deep integration theory.", "import duties integration theory."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply water integration schemes.") or ("import duty integration theory."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply water integration schemes.") OR ("import duty integration theory.")).
• Removing quotes may allow a broader search: (( supply water integration schemes. ) or ( import duty integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (("supply water integration schemes.") or ("import duty integration theory."))*.