CoffeeCo said:
order:invtags *_(disambiguation)
order:invtags -*_(disambiguation)
Both shows *_(disambiguation), but the results are slightly different.

For example, try
*_(disambiguation) straw_(disambiguation)
and
-*_(disambiguation) straw_(disambiguation)
vs
*_(disambiguation) jay_(disambiguation)
(this returns results because of prey_(disambiguation) which is in the top 40)
and
-*_(disambiguation) jay_(disambiguation)