Search based on a set of keywords

Question

I need to make a search based on a set of keywords, that return all the Ads related with those keywords. Then the result is a list of Categories with the Ads Count for each

Answer 1

I recommend to NOT define keywords to objects that way, because you might search and find too many objects or you'll find possibly nothing. You will always spoil your time when searching. Classify your objects in a way that the users focus is to FIND and not to search.