Sorry for lack of explanation from me.
In field "Prezime" should be first 3 letters from surname; There should be
some kind of script which will make list of those three letters. Our alphabet
Fields "Ime" and "Adresa" aren't required.
In first field should be Sarajevo,
In second field "Prezime" put "aga"
And click on button "Trazi"
You should see the table where "Prezime" is surname; "Ime" is Name; "Broj Telefona" is Telephone number; Adresa is "Address"