the logic of full text search

[Sjef Janssen]

Hi there,
I am trying to understand the logic of full text search in mysql. I'm not using mysql 
4. The search work OK, be it thast I get hits on certain words, whilst other words are 
discarded for some reason or other. Why is that. An example: I search in a text field 
for the word organisation. I get hits. When I search for the word scenario nothing is 
found. But I can see the word in the paragraphs by myself?
Is there an explanation for this?
Thanks,
Sjef