...The main text in docx files is found in document.xml file in the collection. Corrupt DOCX Salvager uses 7Zip, an unzipper that sometimes unzips partially corrupt document.xml files despite reporting an error.
XML as a format is unforgiving of data corruption but Corrupt DOCX Salvager uses a Perl routine used to extract the text from the document.xml file which doesn't care about well-formed XML, a recovery stumbling block for Microsoft Word.
Recent changes include the pretreatment of docx files with InfoZip's zip.exe -FF repair command, improving success rates. ...