PHP/SQL search project

Hello. We have a tricky little PHP/SQL requirement that need tackling pretty quickly. In short, we have a searchable database up and running on a client's site but we need to enhance it to include combined search options, probably using check boxes. There will be three options for the user to choose from in any combination to produce relevant results.

If possible, we'd like this done by the end of this week - working in liaison with our developer. Your help will be much appreciated if you'd like to bid. More details on request - and thanks for your interest.