I have never had much luck with the find all since usually I am looking in thousands of cells of data. However the code below will highlight any cells on the worksheet orange if there is an exact match and the yellow if there is a partial match. Be sure to save and backup your workbook before running.
Code:
Sub HighlightSearch()
Dim rng As Range, c As Variant, SearchString As String
SearchString = InputBox("Search the used range for?")
If SearchString = "" Then End
Set rng = ActiveSheet.UsedRange
For Each c In rng
If InStr(1, UCase(c.Value), UCase(SearchString)) Then
c.Interior.ColorIndex = 6 'highlights yellow
End If
If UCase(c.Value) = UCase(SearchString) Then
c.Interior.ColorIndex = 45 'highlights orange
End If
Next c
End Sub