You want lots of different people to visit your site. You want to make it easy for all of them to find what they're looking for but you can't possibly create a special menu for each of them. Please put your hands together and breathe a great sigh of relief for the Faceted, also known a Guided search. From fridges to briefing papers, the genius of the guided search is in presenting the user with appropriate filters for narrowing down what they're looking for - guiding them through the themes, regions, and resource types (or eco-efficiency ratings!) that are relevant to their original search term.

Services page faceted search

Drupal Search using Apache Solr

Apache Solr is an incredibly fast and powerful  search with its own database that is well suited to handling complex queries across records of large databases. This service is mainly aimed at developers and web site administrators who are looking to improve the way their site can be searched and navigated.