If you want to get more out of the like operator, it helps to learn about "Regular Expressions". Without a doubt the authoritative book on this subject is http://www.oreilly.com/catalog/regex/

Very strongly recommend that book. It is the best book in my library :) (which is very small).

Check out some of these other links too. Remember Baan's regex support is very basic.

http://directory.google.com/Top/Computers/Programming/Languages/Regular_Expessions/FAQs,_Help,_and_Tutorials/
http://etext.lib.virginia.edu/helpsheets/regex.html
http://py-howto.sourceforge.net/regex/regex.html