Perhaps you should try some spelling variations:
"export spaces integration theories." » "export spaces integration theorems.", "export spaces integrationstheorie 2.", "export spaces integration theory.", "export space integration theories.", "export success integration theories.", "export seamless integration theories.", "export shares integration theories.", "export sales 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 spaces integration theories.") or ("import price integration through."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("export spaces integration theories.") OR ("import price integration through.")).
• Removing quotes may allow a broader search: (( export spaces integration theories. ) or ( import price integration through. )).
• Adding a wildcard symbol may retrieve word variants: (("export spaces integration theories.") or ("import price integration through."))*.