Add another useful example-query to the search-option page:
an explanation on how to combine searches for specific tags (OR'ing tags).
The whole thing is discussed here on MSO,
but the search-options page does not explain how to do this, but it should. (Instead it explains much more complex and weirder queries)
Add one more line here:
to specific tags [tag] apples oranges [tag] [another-tag] apples oranges
> [tag] [OR] [another-tag] apples oranges
...assuming the line is correct.. maybe you cannot add any other search terms when you have used the [OR] operator with [tags]