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."
"support grant integration series." » "support grant integration services.", "support grant interaction series.", "support grant integration server.", "support migrant integration series.", "support migrants integration series.", "support statt 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: (("support grant integration series.") OR ("import price integration theories."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support grant integration series.\") OR (\"import price integration theories.\"))".
• Removing quotes may allow a broader search: (( support grant integration series. ) OR ( import price integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support grant integration series.") OR ("import price integration theories."))*.