Text encoding, Non readable, does anybody know how to get out of this problem?

Thanks for everyone help, I believe there is problems with Mac OS Default can not recognise the text format in this document, this document originally was the word document, I have adobe acrobat in my mac, I open it with and it converted it to pdf, as I said before, it can be open with chrome, and be open with google Document, because I don't trust pdf and I don't want to save it in pdf, I want to save it in word, for 3 days I failed to do it, now after trying Unicode [ UTF-8 ] and tick the 3 box, the document open in word but still unreadable, it was giving me warning that the document is damaged or unsupported format, it says I should use text editor, I did it and it became readable but all the wards was cross over and everything stuck, the mac color bold start rolling and and no ending, I tried forced quit it can't be done, unexpectedly Mac update was waiting for me to download, I went for it and it forced close, I went back after the update, I opened the document with word, it was still not readable, I can see that, I always use bold, bold italic, Ariel, those kind of staff on the top bar there, it was [ courier new ] there, I click on courier new drop down and I changed it to bold and immediately the text became readable, it was that " COURIER NEW " which is not supported by Mac OS { Default } and can not, the person who sent me the document use that courier new and that is why the document can't be open by word. I learn the hard way, thanks everybody who tried their best to help.

Thanks for your support, I can open that same document with adobe acrobat pdf, chrome, Google document, but not with word in my macbook pro OS Monterey, I saw a couple of people posted the same issues but no answers was given, it looks realy very Isolated case. The problem with microsoft is they will tell me to upgrade to office 365 subscription, they keeps sending me update to upgrade, I have volume licence office in this mac is enough for home use. thanks for your help.

thanks for your help, the document itself is not a pdf document, however, it is open with pdf, chrome and google Document, the document can be open with word but it is not readable as you can see in the screenshot, it is beyond my knowledge, the default, Mac OS [default] Should have done everything automatically but it is not, i use others unicode [ utf-8 ], I tick those 3, insert the line break, allow characters substitute and add bi-directional marks and below is what you can see.