Perhaps you should try some spelling variations:
"import duties conservation efforts." » "import sites conservation efforts.", "import species conservation efforts.", "import outline conservation efforts.", "imports duties conservation efforts."
"support urban integration through." » "support urban innovation through.", "support european integration through.", "support urban migration through.", "support chain integration through.", "support carbon integration through.", "report urban integration through.", "supply 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."))*.