Copilot can’t find a string/word (specifically a name) in a long .docx document.

Question

So we’ve got a Copilot Pro licenses at my workplace to try it out and find a way to implement Copilot in our daily tasks. I’ve got a long Word document (100 something pages).

When I ask Copilot to look for a specific name, that is mentioned in lower half of the document many times in the exact format, it indeed tells me that the name IS mentioned in there and then it’ll cite 3 or 4 exact parts of the document in quotation marks, none of which even remotely contains the name I’m looking for, not even close. What I have to do is completely delete the first half of the file for Copilot to finally notice the name, now on first page, but only cites 4 instances, whereas in the first page only there’s probably 8 times the name mentioned. And on the second and third page many, many more times.

I’ve tried to ask Copilot to “search the whole document”, tried to highlight the whole text and then input the prompt. I even specifically told it there’s more mentions and to find them all..nothing. Is Copilot really that bad? Is ctrl+f more powerful than AI in 2025? Am I doing something wrong? Help me please.