Hi Erkan. ‘Thus’ means ‘in this/that way’ - it relates to ‘HOW’ or the manner in which - this or that happens or comes about. It has a practical flavour. eg.Traditionally, you arrange things thus = Traditionally, this is how you arrange things
‘Hence’ is a very old fashioned word which means ‘from this/that’ - it relates to WHERE - position, or point in time; it tells from where or what, or to where or what, something comes, derives, or goes
e.g.s Get thee hence! = Get yourself away from here!
Henceforth all entrances will be guarded = From now on all entrances will be guarded.
She got the job - hence her good spirits = She got the job and her good spirits derive from that fact. (Note the different slant to ‘therefore’, which would also fit, but would say ” her good spirits are due to (’because of’; ‘for that reason’) that”.