SugarCRM中的搜索和一对多关系

I'm trying to create tag-like category field for my contacts in SugarCRM. I've read through some docs, created a module and connected it with my contacts as 1 to N relation. The problem is, that Edit Form allows to choose only one category, but then you can add as many as you want in Contact View. But when you search, it only finds contact that have category set in edit form, but does not pay attention to other categories set in list. I'm trying to create tag-like category field fo