Applications :: Evolution Mail Filters - Several Keywords Possible?

I use filters for the incoming messages, based on the subject. I wanted to know if I could give several keywords at once just by filling one field. I want the filter to place the message in a folder if just one keyword fits. How could I fill the field <subject> <contains> and separate my different keywords, saying that it's not an "and" but an "or".. I tried like that:
<subject> <contains> : x | y | w | z
<subject> <contains> : x ; y ; w ; z
<subject> <contains> : x , y , w , z
but none of these worked. Is there a way or should I create several and same conditions for each different word?