Perhaps you should try some spelling variations:
"report formal integration theories." » "report formal integration theorems.", "report formal integrationstheorie 2.", "report formal integration theory.", "report forming integration theories.", "report forward integration theories.", "report social integration theories.", "report forms integration theories.", "report fiscal integration theories."
"support agri integration series." » "support agri integration services.", "support agri interaction series.", "support agri integration server.", "support grid integration series.", "support der integration series.", "support iii integration series.", "support aging integration series.", "support a 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 agri integration series.") OR ("report formal integration theories."))~.
• Removing quotes may allow a broader search: (( support agri integration series. ) or ( report formal integration theories. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support agri integration series.") or ("report formal integration theories."))*.