Wildcards - these are symbols that denote an unknown part of a string; % indicates 0, 1 or more characters and _ (underscore) a single character in a search. For example, using 'sm_th' will find smith and smyth. Also, remember that the chosen pattern of letters and wildcards can be anywhere in the field, eg: in surname, ST%L (or lower case) will find STarLing, conSTabLe, STeeLe, paSTaL, etc. Wildcards can be used in the KEYWORD field.