Perhaps you should try some spelling variations:
"support estimate interactions series." » "support state interactions series.", "support estimate interregional series.", "support time interaction series.", "support estimate interaction terms.", "support estimate interactions between.", "support climate interactions series."
"support grid integration series." » "support grid integration theories.", "support grid integrating services.", "support grid integration schemes.", "support trade integration series.", "support _ integration series.", "support data integration series.", "support agri integration series.", "support grant integration series.", "support group 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 grid integration series.") or ("support estimate interactions series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grid integration series.") OR ("support estimate interactions series.")).
• Removing quotes may allow a broader search: (( support grid integration series. ) or ( support estimate interactions series. )).
• Adding a wildcard symbol may retrieve word variants: (("support grid integration series.") or ("support estimate interactions series."))*.