You will be able to create search filter for your WordPress blogposts with ease! Just use the taxonomies and custom field values, you have already in use to create amazingly detailed search filters.
Fulltext Search - You can implement a fulltext search, which searches exactly the content, you want. Decide yourself, if you want to extend the search to specific custom fields, the title, the content and so on.
Select Box, Checkboxes, Radioboxes - Use these features, to place form fields, by which your visitor can restrict the search to specific terms or meta data values.
https://wordpress.org/plugins/filter-custom-fields-taxonomies-light/
http://codecanyon.net/item/filter-custom-fields-taxonomies/6964843
Fulltext Search - You can implement a fulltext search, which searches exactly the content, you want. Decide yourself, if you want to extend the search to specific custom fields, the title, the content and so on.
Select Box, Checkboxes, Radioboxes - Use these features, to place form fields, by which your visitor can restrict the search to specific terms or meta data values.
https://wordpress.org/plugins/filter-custom-fields-taxonomies-light/
http://codecanyon.net/item/filter-custom-fields-taxonomies/6964843