Hi @abdullah2019
I understand that upon selecting a category from the dropdown of the search bar, it is sometimes showing constant results while at other times just 3 results right there but the rest of the results on next pages.
The issue of showing constant results can be attributed to caching, so you can try clearing the cache as explained here and also here.
As for just three search results showing on the first page, this seems to be related to the construction of the page, so getting in touch with Elementor support would be a good idea: https://elementor.com/support/
Before that, we recommend contacting the Crcocblock support team as they would be able to help set the best settings for their plugin. You can request support here: https://crocoblock.com/help-center/
Both of these are third-party plugins, which limits us from being able to provide support in these.
I hope this helps point you in the right direction.