SEARCH IN COMBOBOX

how can we search in the combobox when the searchable properties is true, if we just give some details from the string we are looking for. Example : we are looking for the lastname PAPADOPOULAKIS and we don't remeber it all . lets say we just remember the PAP - POU - KIS  .is there a way to use something like this >>>>PAP%POU%KIS  ????