Use double quotes – e.g. "under 10" searches for the exact match "under 10" as opposed to content containing "under" and "10"
"under 10"
Use an asterisk – e.g. pass* – searches for pass, passed, passing etc.
pass*
Combine the search features to narrow your search – e.g. "under 10" basic drills kick*
"under 10" basic drills kick*
