Perhaps you should try some spelling variations:
"export taxes international ports." » "export states international ports.", "export cases international ports.", "export games international ports.", "export taxes international airports.", "export taxes international poverty.", "export taxes international efforts."
"supply aid conservation efforts." » "supply land conservation efforts.", "supply bird conservation efforts.", "supply wild conservation efforts.", "supply asia conservation efforts.", "supply a conservation efforts.", "supply ann conservation efforts."

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: (("supply aid conservation efforts.") OR ("export taxes international ports."))~.
• Removing quotes may allow a broader search: (( supply aid conservation efforts. ) or ( export taxes international ports. ))~.
• Adding a wildcard symbol may retrieve word variants: (("supply aid conservation efforts.") or ("export taxes international ports."))*.