Looks like 10 pages/ 200 results is a xenforo forum default:
"Yes, XenForo imposes a limit on the number of search results which consequently limits the number of pages.
Here are the key details regarding the limits:
- Default Limit: By default, search results are often capped at 200 results, which equates to 10 pages if the "posts per page" setting is 20.
- Maximum Limits (Admin Configurable): In XenForo 2.0+, this limit is governed by the maximumSearchResults option, which can generally be increased up to 1,000 results in the admin control panel.
- Performance Considerations: Setting this number too high (e.g., 200k) can lead to severe performance issues.
- Elasticsearch (Enhanced Search): When using Elasticsearch, there may be a further, more restrictive limit (often 400 pages or 10,000 results) to prevent server strain.
How to circumvent or manage this:
- Narrow Search Criteria: Use "newer than" or "older than" filters to break up large search results.
Increase Limits: Administrators can increase the maximum search results in ACP > Options > Search options.
If you are looking for more than 10 pages of results, it is recommended to narrow the search terms rather than significantly increasing the maximum results, which can impact forum performance. "