Search inside pdf files in a cpanel hosting

Hi ,
I am using nextcloud on a cpanel hosting , I trying to add search that show files by searching ocr or inside files text .
there is a full text search app , but it need to install Elastic Search to get it run but I am using a shared cpanel hosting so I do not have access to the terminal and I cannot install it . ( I checked with the hosting support and there answer was there are nothing we can do to install elastic search) .
Is there any other ways to create a text search inside pdf files ?

i appreciate your help .