alt.internet.search-engines

Can anyone explain this puzzle please? I've just started looking for a
program that will take a word and reverse it. IOW, take 'This' and
produce 'sihT'. So in Google I started with 'transposition program'.
From the hits, I immediately realised many dealt with musical aspects.
I also thought I'd narrow it a bit more by including 'word'. So I
re-entered the search as 'transposition program -music +word'.

But in the first page "Results 1 - 20 of about 33,600 for
transposition program -music +word. (0.33 seconds)" I see several hits
that *do* include 'music'. For example
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Software Download: Transpose
Use the transposition facilities to aid you in writing music or
transcribing pieces you don't have ... In fact think of it as a
word-processor for music. ...
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Terry, East Grinstead, UK