Open Word Document and Bring to Front

You can achieve what you want using APIS. I am using two APIs SetForegroundWindow and FindWindow

Private Declare Function SetForegroundWindow Lib "user32" (ByVal hwnd As Long) _
As Long

Private Declare Function FindWindow Lib "user32" Alias _
"FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) _
As Long

Sub Sample()
    Dim objWord As Object, docWord As Object
    Dim strPath As String, FileName As String
    Dim hwnd As Long

    Set objWord = CreateObject("Word.Application")
    objWord.Visible = True

    '~~> Change this to the relevant Filename and path
    strPath = "C:\Users\Siddharth Rout\Desktop\Sample.docx"
    '~~> Put the acutal file name here without the extension
    FileName = "Sample"

    Set docWord = objWord.Documents.Open(FileName:=strPath, ReadOnly:=True)

    hwnd = FindWindow(vbNullString, FileName & " [Read-Only] - Microsoft Word")

    If hwnd > 0 Then
      SetForegroundWindow (hwnd)
    End If
End Sub

NOTE: If you are sure that there is no other Word Application open other than what you opened then you can use this as well :)

Private Declare Function SetForegroundWindow Lib "user32" (ByVal hwnd As Long) As Long

Private Declare Function FindWindow Lib "user32" Alias _
"FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Sub Sample()
    Dim objWord As Object, docWord As Object
    Dim strPath As String
    Dim hwnd As Long

    Set objWord = CreateObject("Word.Application")
    objWord.Visible = True

    '~~> Change this to the relevant Filename and path
    strPath = "C:\Users\Siddharth Rout\Desktop\Sample.docx"

    Set docWord = objWord.Documents.Open(FileName:=strPath, ReadOnly:=True)

    hwnd = FindWindow("OpusApp", vbNullString)
    If hwnd > 0 Then
      SetForegroundWindow (hwnd)
    End If
End Sub

How about,

docWord.Activate

This should bring the file that has been "Set" for the docWord object to foreground.

EDIT: Tested this on Access, quiet unreliable on Excel. Using an API is the best way to go if there are multiple instances of the Word application running.

Once you've opened a document (or added one) you can get a Hwnd to pass to the SetForegroundWindow API function from the ActiveWindow object (e.g. obWord.ActivieWindow.Hwnd). That way you don't need to search for the correct Word instance to bring to front.