I am using the latest version of Adobe Acrobat Reader version 2023.006.20380 |64 bit and when i have opened this PDF file, i am unable to search the word "fouling", when there are in many instances the word "fouling'' appears in the document.

When i have used other PDF readers, to search for the same word "fouling', those other PDF readers are able to search for these.

Please fix the problem and communicate with me on ramesh.nair.palpanathan@gmail.com

The attachment of the document known as ch11.pdf is hereby attached for you to investigate.