Search within multiple fields

Hi,

I have three country fields (multi query drop down) and need to have ONE search field (also multi query drop down) for searching a country which is in one of the three country fields.

Do you have a doc for this? Or a hint, in which way I should start this in CB?

Thanks a lot, best regards
Eric

We've no functionality for that. With CB 3.x during the rewrite we'll be reviewing rewriting all core functionality and combined field searching on user lists is something we want to implement. For now the only solution I can think of is CB Search Bot and using Joomlas search.