By trying to search this:
hasaccepted:0 excel vba excel-vba
I started to read more about the search options inside SO, and found
Now the answer by Jeff M from community wiki was quite nice, but I wondered why there can't be an additional section between related tags and questions tagged to specify the operator.
It should be easy to build in and would provide a great improvement to fast tag-search, having only to click on a tag-like OR, AND or XOR button. There is even enough space to extend this with tag-like buttons for
So please be so nice and tell me, if this feature will/is/was considered and what the result is/was, if there is one.