I need to search a PDF for some words that contain diacritics (accents, eg é à) but I don't know what the accents are. The search comes back 'Nothing found'. How do I search for these words?

I'm searching a PDF document (a dictionary in a obscure foreign language) but as I am learning the language, I am not always sure of the diacritics/accents of the word. I want to be able to enter a search for 'noko' and have the results show 'nókò' or 'nókó', etc. In other words, I want to be able to enter a search for a word without diacritics, but have the search ignore whether there are diacritics or not.

Without this possibility, it is impossible for me to find out how a word in the dictionary is properly spelt or pronounced. It should be possible to search for words with or without diacritics, like you can with or without capitals, but I don't know how to do it. Please can someone help? Thank you!