I don't think this is currently possible: I would find it helpful if I could run two searches and compare / contrast the results to find where they differ. E.g. I just searched the KJV for "first fruit*" | "firstfruit*"which found 34 hits in 32 vv. Then I searched only for firstfruitswhich found 32 hits in 30 vv. Since the only difference was the plural / singular distinction (I discovered "first fruit" with a space does not occur in the KJV), I then searched for the singular firstfuitwhich found the two differences. There have been other times when I'd have liked to have been able to compare results, especially when there are lots and lots of hits.