I've never heard of the movie, and probably Moore hadn't either.
But I do know whenever I try to do a Google search for a common phrase or historic name/event.... many times the first hits are degenerate popular culture movies and/or music groups using the same words/names. When I first arrived on the internet, I used an historic name as my name on a forum and kept being repeatedly mocked because, apparently, that historic name is also British slang for slut.
I am well aware of the problem. I have had exactly the sort of difficulty you described. The only example that comes to mind at the moment is my effort to find a song that I knew when I was young, (Man from Mars) and all that comes up is more recent pop culture crap.
Here are some lyrics that I can sort of remember. 1960s rockabilly style.
"Well I'm a man from Mars
just as cute as can be
and all the girls just want to kiss me tenderly,
cause i'm a little bitty jitter bugging man from Mars
cause i'm a little bitty jitter bugging man from Mars
cause i'm a little bitty jitter bugging man from Mars
and I'm painting the town tonight! "
All I get is "Bruno Mars" and assorted other modern crap.