You should only be using the 'AND' and 'OR' separators to differentiate between the different criteria. It sounds like you have a single criterion, to do a like search with a single field on multiple columns. To do this you would just make sure that you have both columns selected. This way it will do the search on both columns regardless and return results where there were matches. So if the user enters something for an item that is either part of the name or part of the description that record will be returned in the results.