Report design - created a report based on business view join of F4211 and F42119

I created a report based on business view join of F4211 and F42119 however the data can exist in either one of the tables and not both. I am trying to make it easier for user with selection criteria. My process will look into the sales file as well as history. I am trying to set data selection something like where branch plant F4211 is equal to <values> and date (F4211) is equal to <values> Or branch plant F42119 is equal to <values> and date (F42119) is equal to <values>. Now rather than user entering the values four times I