Welcome to the OvniConv project.
This project is about developing some OpenDocumentFormat tools to help converting to TCVN 6909:2001 (Unicode) all files encoded with old Vietnamese encoding, say TCVN 5712:1993, VNI, VPS, and so on.
Detailed explanation of the problem of displaying non unicode vietnamese fonts
This page is more interesting in term of history since the hosting and the development of the project is hosted here :
there's also an openoffice.org extension that exist also :
unzip test.odt content.xml
iconv --from=UTF-8 --to=WINDOWS-1252 < content.xml > content-tcvn.xml
iconv --from=TCVN-5712 --to=UTF-8 < content-tcvn.xml > content.xml
zip test.odt content.xml
About the HyphenationIssue