Perhaps you should try some spelling variations:
"volunteering cross border-sloop" » "volunteering across border-sloop", "volunteering abroad border-sloop", "volunteering civic border-sloop"
"counter across brief-sloop" » "counter macros brief-sloop", "encounters across brief-sloop", "countries across brief-sloop", "counter across barrier-sloop", "counter across border-sloop", "counter across darien-sloop"

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: (("volunteering cross border-sloop") OR ("counter across brief-sloop"))*.
• Removing quotes may allow a broader search: (( volunteering cross border-sloop ) or ( counter across brief-sloop ))*.