Perhaps you should try some spelling variations:
"import business conservation efforts." » "import business cooperation efforts.", "import business convention efforts.", "import business operation efforts.", "airport business conservation efforts.", "port business conservation efforts.", "importing business conservation efforts."
"import duty integration efforts." » "import duty international efforts.", "import data integration efforts.", "import south integration efforts.", "import deep integration efforts.", "import duties integration efforts."

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

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