I am unable to search in pdf documents in ios 16.1.1

Hi Sumi148,

Welcome to Apple Support Communities. We understand that you're having an issue searching for items within a PDF. We'd like to help.

Where on your iPhone are these PDFs saved? If they are in the Files app, what happens when you try to search within the document? Are you searching for a phrase in the main Search bar or using the Search feature within a document? If you're not seeing the search results you'd expect, closing your Files app and restarting your iPhone may help:

How to close an app

You should close an app only if it’s unresponsive. The way you close an app depends on the type of device that you have. Find your iPhone or iPod touch model below, then follow the steps. Or learn how to close an app on your iPad.

iPhone X and later

1. From the Home Screen, swipe up from the bottom of the screen and pause in the middle of the screen.

2. Swipe right or left to find the app that you want to close. 

3. Swipe up on the app's preview to close the app. 

How to restart your iPhone X, 11, 12, 13, or later

1. Press and hold either volume button and the side button until the power-off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.

Let us know how that goes.

Take care!