I dont know if this will help but.....
Have you tried copying the file in question to an easy location like the desktop or something and then fired up word and clicked file open and then on the drop down box under the file name you have an option that is recover text from any file, if you click that and then open the corrupted word document in question it might produce a load of rubbish but at the same time, it might recover all the text any how its worth a try!
docx files are really zip containers containing xml
docx files files are really zip containers containing xml files
You should be able to open the docx file with zip program. I am not sure whether you have to change the extension from docx to zip. Just try to open the docx file first with zip. If that doesn't work, then change the extension to zip. You should then be able to get to all the parts of your document.
I hope this helps.