Perhaps you should try some spelling variations:
"support group international airshow." » "support from international airshow.", "support how international airshow.", "support do international airshow.", "support grant international airshow."
"support fuel conservation efforts." » "support soil conservation efforts.", "support forest conservation efforts.", "support water conservation efforts.", "support falls conservation efforts.", "support funds conservation efforts.", "support from 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: (("support fuel conservation efforts.") or ("support group international airshow."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support fuel conservation efforts.") OR ("support group international airshow.")).
• Removing quotes may allow a broader search: (( support fuel conservation efforts. ) or ( support group international airshow. )).
• Adding a wildcard symbol may retrieve word variants: (("support fuel conservation efforts.") or ("support group international airshow."))*.