Find features are different than the 
Find a lexical entry and 
Find a reversal entry features.These Find features are different than the Find a lexical entry and Find a reversal entry features.
Here you can use a simple Find dialog box to find search text (that is, the character string, word, or phrase that you want to find). You can paste in the box or type with the current (active) keyboard. There are no search options.
In the Navigation Pane, click Lexicon, and then click Dictionary, Reversal Indexes, or Classified Dictionary.
Do one of the following:
On the toolbar, click 
.
Press the shortcut keys Ctrl+Shift+F.
On the Edit menu, click Find.
The Find dialog box appears.
Do the following in the dialog box:
Type or paste the search text in the box.
Click Find Next or Previous until you find the desired occurrence.
Click X to close the dialog box.
This Find feature can only search the displayed set of entries.
See: Navigating in Dictionary or Navigating in Reversal Indexes. This feature is the same (and gives the same results) as a Find feature you would use in an Internet browser, such as Firefox.