Possibly another related issue - search doesn't find part of a title enclosed in brackets or parentheses ( )
example - in Canada, the movie "What If" is usually called "The F Word" - the original title. I edited the title to be What If (The F Word)
Searching for "the F Word" gets no results. It will find the "the F Word" if the title is changed to What If ( The F Word ) - that is, a space before and after the alternate title enclosed in the brackets.