I have a Windows 7 partition mounted in Ubuntu. In order to access the fonts I created a link to the Windows font folder using
ln -s /path/to/your/windows/fonts/folder .fonts/windows
I then refreshed my font cache using
sudo fc-cache -fv
I only get Cambria in italics in LibreOffice. All the versions are available in gedit. Is there a way to get the regular and bold versions too?