Since the prompt is a bit ambiguous, here are the most likely ways to interpret your request.
When searching on eBay, use quotes: "FightingKids (2007) DVD" or "Fighting Kids movie rare." fightingkids dvd top
The collection typically focuses on athletic skill-building and competitive highlights: Since the prompt is a bit ambiguous, here
After comparing rarity, message, action quality, and bonus features, the single best DVD for the keyword is: and bonus features