Select the appropriate value in the pre-filled fields. Reduce your search by text / numbers in the other.
In Name, you can fill in an "a" and get up all in a last name, or you can fill in part or full last name.
In Position, you can choose = and enter 1 to make up all class winners (if you selected "All" under class, or select <(less than) and add 4 to get the No. 1, 2 and 3 in all classes .
In the club you can do that in the Name field (the first letter, parts or the whole name).
The number of marks you can choose =, enter 50 to get up all that has 50 marks. Or select> ( "greater than"), fill in the 19 and get up all that has 20 or more marks.
Follow the link on the name of the participant in the results to see the details (intermediate times, the number of marks and the number of times participated).