Perhaps you should try some spelling variations:
"import duties conservation efforts." » "import species conservation efforts.", "import water conservation efforts.", "import fuel conservation efforts.", "imports duties conservation efforts."
"support urban integration through." » "support urban innovation through.", "support european integration through.", "support global integration through.", "support trade integration through.", "support carbon integration through.", "support grant integration through.", "report urban integration through."

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: (("import duties conservation efforts.") OR ("support urban integration through."))~.
• Removing quotes may allow a broader search: (( import duties conservation efforts. ) or ( support urban integration through. ))~.
• Adding a wildcard symbol may retrieve word variants: (("import duties conservation efforts.") or ("support urban integration through."))*.