Bus family

Your English is pretty good, but it may not be clear enough for a precise search. You could rephrase it like this:

"I recently saw a family living in a bus, which seemed to have around 7 or more members. How can I find them again online? What keywords should I use for this search?"

As for the keywords to search for this family, it largely depends on the specific details that you remember about them. However, you could start with terms such as "family living in a bus", "large family bus home", or "nomadic family in bus". You might need specific details like location, their names, or unique attributes about their lifestyle to refine your search further.