[otrs] Dual word searches

Hi, Just sending this on again, no response to initial mail. Does anyone know how I can implement dual word searches within FAQ search? Say for instance, someone wants to search for "phone list", and I have the words "phone" and "list" as the keywords of the article, the article will come up when either the words phone or list are used in the search, but not at the same time... so how can I implement dual word searches? Putting inverted commas around the two words doesn't work. OTRS - 2.4.4 FAQ - 1.6.4 Thanks Emily