Hi, again,
No additional setting. So, your search results include topics
that contain "additive" but not "polymer", "polymer" but not
"additive", and both words separated by more than eight others?
If you feel comfortable sending your .chm file to me, I'd be
happy to take a closer look at it. (Click my name at the left.)
Failing that, perhaps you could paste the contents of your project
(.hhp) file into a reply so that I can try to reproduce the problem
in a test file that is based on your project settings.
Pete