Perhaps you should try some spelling variations:
"import trade integration services." » "import trade integrating services.", "import trade integrated services.", "import trade insemination services.", "export trade integration services.", "import price integration services.", "import taxes integration services."
"supply social integration theories." » "supply social integration theorems.", "supply social integrationstheorie 2.", "supply social integration theory.", "supply global integration theories.", "supply financial integration theories.", "supply regional integration theories."

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 trade integration services.") or ("supply social integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("import trade integration services.") OR ("supply social integration theories.")).
• Removing quotes may allow a broader search: (( import trade integration services. ) or ( supply social integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("import trade integration services.") or ("supply social integration theories."))*.