Perhaps you should try some spelling variations:
"support estimate interregional series." » "support estimating international series.", "support estimate interregional trade.", "support climate interregional series.", "support state interregional series."
"support fare integration efforts." » "support fare international efforts.", "support fare conservation efforts.", "support market integration efforts.", "support trade integration efforts.", "support data integration efforts.", "support falls integration efforts.", "support state integration efforts."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support estimate interregional series.\") OR (\"support fare integration efforts.\"))~".
• Removing quotes may allow a broader search: (( support estimate interregional series. ) OR ( support fare integration efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support estimate interregional series.") OR ("support fare integration efforts."))*.