Probleam with filter

[wylton]

on a table have datos like :
id nr
1 a
2 abc
3 cba
4 cab
5 bc

when I use zquery.filter :='nr like ''*a*'' ';
only show 2 recordes:
2 abc
4 cab
the id 1 with 'a' do not show and ni id 3 with 'cba'..