Perhaps you should try some spelling variations:
"support grant integration theories." » "support grant integration theorems.", "support grant integrationstheorie 2.", "support grant integration theory.", "support migrant integration theories.", "support migrants integration theories.", "support statt integration theories."
"export price integration series." » "export price integration services.", "export price interaction series.", "export price integration server.", "export service integration series.", "export trade integration series.", "export price indexation series.", "export prices integration series.", "import prices integration series."

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

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