Using “and” and “or” when FINDing

I looked through the existing answers, but found no hits.

First, from 35,000 feet, what is the title of the topic I’m asking? Is it an “advanced find?” Is it a “logical find?” It may be a logical find, since AND and OR are logical operators. The number of mental layers involved are making it really unclear for me on this issue. (-;

Next, will Brave FIND using the logical OR operator? Can Brave highlight “A” or “B” on a page if I type

“A” or “B”

in its FIND field, or are two FINDs required on every page?

Thanks.

DP
Henderson, NV