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."
"support price integration series." » "support price integration services.", "support price interaction series.", "support price integration server.", "support service integration series.", "support trade integration series.", "support price indexation series.", "support process integration series.", "support policy integration series.", "export price integration series."

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

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