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