I read that 3.6 can import Corel Draw files, but I can´t find out how to do it.
Yes, libcdr is the new library module, overseen by Fridrich Štrba, providing support for Corel Draw documents at LibreOffice 3.6. It is integrated into the Draw component.
You simply launch Draw → File → Open and enter the filename**.cdr** in the dialog.
The conversion is not 100%, but should retain enough text formatting to manually finish a conversion.
So it was that simple! Works good enouigh.
How’s about LibreOffice 5 ? It do not convert and give an error message.