Perhaps you should try some spelling variations:
"support oil importing countries." » "support oil exporting countries.", "support oil importing country.", "support oil imports countries.", "support oil importers countries.", "support big importing countries.", "support our importing countries.", "support build importing countries."
"supply good conservation efforts." » "supply wood conservation efforts.", "supply good conversation efforts.", "supply good conversations efforts.", "supply food conservation efforts.", "supply cold conservation efforts.", "supply crowd conservation efforts."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("supply good conservation efforts.") or ("support oil importing countries."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply good conservation efforts.") OR ("support oil importing countries.")).
• Removing quotes may allow a broader search: (( supply good conservation efforts. ) or ( support oil importing countries. )).
• Adding a wildcard symbol may retrieve word variants: (("supply good conservation efforts.") or ("support oil importing countries."))*.