After installing
Code:
ttf-mscorefonts-installer
I would also install
Code:
fonts-crosextra-caladea
fonts-crosextra-carlito
which are metrically compatible with Cambria and Calibri (i.e., won't change linebreaks, etc.).
Alternatively, if you have a hotmail or outlook account, you can upload the original .docx file to OneDrive and edit the .docx online and then download it. It's worth creating such an account even for unedited .docx files because after uploading you can view as pdf and download the pdf with the correct fonts and spacing.
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