IF? you are willing to convert to text, a macro can do it all.
Then, If you can find the start/stop  of where you want to change the
format, again a macro using "characters" can do it for you with one mouse
click.

Hi

The following piece of code should get you started on emboldening
everything after the hyphen between tour two concatenated strings.

I used cells J1:J3000 as the range to work on, change to suit the range
where your data lies

Sub BoldPartString()

Dim test As String, First As Integer, Last As Integer, Length As Integer
   Dim c As Range
   For Each c In Range("J1:J3000")  '<== Change to suit your range
   test = c.Value
   If test = "" Then Exit Sub
   Last = Len(c)
   First = WorksheetFunction.Find("-", c) + 1
   Length = Last - First + 1
   ' now embolden from first to last characters
   With c.Characters(Start:=First, Length:=Length).Font
              .FontStyle = "Bold"
  End With
  First = 0: Last = 0: Length = 0
  Next c
End Sub

You can copy the code and paste it into your Visual Basic Editor
(VBE) in a Standard Module located in your file.

To do this,

Alt + F11 (open VBE)
Ctrl + R (open Project Explorer)
Select the file name on the left
Insert > Module
Paste code in Module

David McRitchie has lots of useful help on his site at
http://www.mvps.org/dmcritchie/excel/install.htm
http://www.mvps.org/dmcritchie/excel/getstarted.htm