When searching a .ost file for a particular email thread, specifying one criteria (from: brown) in the "containing text" field results in the target email being identified. Similarly, a different criteria (from: orf), results in the same email being identified, since the thread contains the second person's reply.
However, using "brown orf" (without quotation marks) as a boolean search, or brown; +orf as a plain text search, or brown AND orf (boolean), results in no hits.
Searching for brown, then searching the results list for orf, results in the correct match.
Not sure if this apparent issue is email field specific but searching for two words known to exist in the body text also resulted in no matches.
Is it possible to specify more than one criteria per search?