Perhaps you should try some spelling variations:
"import price integration theories." » "import price integration theorems.", "import price integrationstheorie 2.", "import price integration theory.", "import service integration theories.", "import trade integration theories.", "import price indexation theories.", "import prices integration theories.", "export price integration theories.", "export prices integration theories."
"export policies testing services." » "export policies meeting services.", "export policies using services.", "export policies being services.", "export policies existing services.", "export policies lending services.", "export policies training services.", "import policies testing services.", "support policies testing services.", "efforts policies testing services."

Try widening your search to All Fields.

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

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