Search api only have 5 topic result

hi, i use the search api

to seach topic ,but result json only have 5 result of topic ,why that happened?

You are using quick search API endpoint (/search/query.json?term=). Yes, it will return five results only. It is used display results in search menu panel in top header. If you need more results you have to use advanced search API endpoint at /search.json?q=.