Wanting to find verses which contain both "Lord" and "LORD", I typed this:
LORD AND (Lord OR lord)
I deliberately made the search case sensitive.
It didn't produce any results, so I've made a mistake. Enclosing LORD in parentheses didn't solve it. A fuzzy search gave me verses such as Psa 110:1—"The LORD said to my Lord..." which is what I want.
What's faulty with my search term?