Place + in front of a word which must be found and - in front of a word which must not be found. Put a list of words separated by | into brackets if only one of the words must be found. Use * as a wildcard for partial matches.
I can understand putting a '+' in front of a word to be found. Similarly I can understand putting a '-' in front of a word not to be found (but why would you input that word in the first place if you don't want to find it?)
I cannot quite fathom what the next bit means (lists, brackets and what is that 'separator' sign.......). Could anybody supply a couple of simple examples?