Perhaps you should try some spelling variations:
"support 1990 international efforts." » "support 1990 international airports.", "support 1990 international energy.", "support 1990 international airport.", "support 10 international efforts.", "support g20 international efforts.", "support _ international efforts.", "support 1997 international efforts."
"support agri conservation efforts." » "support bird conservation efforts.", "support aid conservation efforts.", "support area conservation efforts.", "support grid conservation efforts.", "support a conservation 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 agri conservation efforts.\") OR (\"support 1990 international efforts.\"))~".
• Removing quotes may allow a broader search: (( support agri conservation efforts. ) OR ( support 1990 international efforts. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support agri conservation efforts.") OR ("support 1990 international efforts."))*.