Alright I get that this might be a little difficult but something I really need for my client. Let me setup the situation.

1. We have a social network where parents can connect their kids to other kids for playgroups etc.
2. So I'm setting up where they put in the data in for their kids including ages, interests etc. under the parent profile.
3 Obviously some parents will have more then one child (btw they are not creating a seperate profile for each child - but I'm adding field groups for each child under the parent profile)
4. When another parent/user want to search lets say specifically age and the put in ages from 5-7 I need it to search multiple fields (each age field for each kid under parent profile)
5. Need this for interests etc. as well

So in summary each child field group as the etc same fields so I need the search field to look at each age field, etc.

Hope that makes sense. Thanks!