Perhaps you should try some spelling variations:
"support key integration theories." » "support key integration theory.", "support key integration through.", "support key integration efforts.", "support eu integration theories.", "support deep integration theories.", "support _ integration theories.", "support them integration theories.", "support does integration theories."
"import data integration some." » "import trade integration some.", "import _ integration some.", "import data integrity some.", "import data integration volume.", "import data integration power.", "import data integration south.", "import duty integration some."

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

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