Perhaps you should try some spelling variations:
"export base integration theories." » "export base integration theorems.", "export base integrationstheorie 2.", "export base integration theory.", "export based integration theories.", "export fare integration theories.", "export care integration theories."
"import price integration through." » "import price innovation through.", "import service integration through.", "import trade integration through.", "import price indexation through.", "import prices integration through.", "export price integration through.", "export prices integration through."

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

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