I need to add search engine to my component. In database I have three feilds: name, post, address. How to add searching with this fields separatly? For example in the view I add three fields and search button. When I click the button it searches for matches with some of the fields.
It's very easy to create your own search plugin as is fully documented at Creating a search plugin.
That sounds like a feature of Component Creator: the search plugin. http://component-creator.com/en/forum/announcements/35-database-updater-frontend-search-plugin
Hope that helps.