Perhaps you should try some spelling variations:
"import duty integration theories." » "import duty integration theory.", "import duty integration through.", "import duty integration efforts.", "import data integration theories.", "import south integration theories.", "import deep integration theories.", "import duties integration theories."
"support better targeting services." » "support better training services.", "support better targeting regimes.", "support better testing services.", "support gender targeting services.", "support better targeted services.", "support better budgeting services."

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 duty integration theories.") OR ("support better targeting services."))~.
• Removing quotes may allow a broader search: (( import duty integration theories. ) or ( support better targeting services. ))~.
• Adding a wildcard symbol may retrieve word variants: (("import duty integration theories.") or ("support better targeting services."))*.