You can use wildcards while searching:
No wildcards means that the string can appear anywhere.
^ is the beginning of the entire password, e.g. entering: ^Jerzy will result in, inter alia, Jerzy Adam, but not Adam Jerzy
$ is the end of the entire password, e.g. typing Adam$ will result in, among others, Jerzy Adam, but not Adam Jerzy
. (period) is any letter, e.g. .-. (with a space in the middle) are two-part names, e.g. Wnuk-Lipiński, and Prze.dziecki is min. Przezdziecki or Przeździecki
.* is 0 or more of any letters, e.g. Nowak. * include Nowakowski
.+ is 1 or more of any letters, e.g. . + siekier. + include Biesiekierski, but not Siekierski, and . +. +. + include three-part names
| it is logical or, for example, Grzegorz | Hryhoryj