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